ABSTRACT
Nonketotic hyperglycemia may occur as a cause of chorea in patients with chronic decompensated diabetes. Because it is rare and consequently poorly studied, diagnosis and treatment can be delayed. Therefore, our objective was to summarize clinical and radiological features, as well as treatments performed, from previously reported cases to facilitate adequate management in clinical practice. We searched MEDLINE/PubMed, EMBASE, Cochrane, CINAHL, Web of Science, Scopus, and LILACS databases for studies published before April 23, 2021. We included case reports and case series of adults (aged ≥ 18 years) that described hyperglycemic chorea with measurement of glycated hemoglobin (HbA1c) and cranial magnetic resonance imaging (MRI). Studies were excluded if participants were pregnant women, aged < 18 years, and had no description of chorea and/or physical examination. We found 121 studies that met the inclusion criteria, for a total of 214 cases. The majority of the included studies were published in Asia (67.3%). Most patients were women (65.3%) aged > 65 years (67.3%). Almost all patients had decompensated diabetes upon arrival at the emergency department (97.2%). The most common MRI finding was abnormalities of the basal ganglia (89.2%). There was no difference in patient recovery between treatment with insulin alone and in combination with other medications. Although rare, hyperglycemic chorea is a reversible cause of this syndrome; therefore, hyperglycemia should always be considered in these cases.
INTRODUCTION
Chorea, from the Greek word choros, means dance. It is a neurological disorder associated with involuntary spasmodic muscle movements. Nonketotic hyperglycemia is a rare cause of chorea. In 1960, Bedwell described the first case of severe hyperglycemia associated with hemiballismus, which resolved with correction of blood glucose (11 Bedwell SF. Some observations on hemiballismus. Neurology. 1960 Jun:10:619-22. doi: 10.1212/wnl.10.6.619.
https://doi.org/10.1212/wnl.10.6.619...
).
Typically, hyperglycemic chorea occurs in Asian women with long-standing type 2 diabetes and chronic poor glycemic control. Cranial magnetic resonance imaging (MRI) shows a characteristic T1 hyperintensity signal in the basal ganglia (22 Xiao F, Liu M, Wang X. Involuntary choreiform movements in a diabetic patient. Lancet. 2019 Mar;393(10175):1033. doi: 10.1016/S0140-6736(19)30304-6.
https://doi.org/10.1016/S0140-6736(19)30...
). A recent systematic review identified 176 patients from 72 articles, of whom only 17% had newly diagnosed diabetes mellitus at first presentation (33 Chua CB, Sun CK, Hsu CW, Tai YC, Liang CY, Tsai IT. "Diabetic striatopathy": clinical presentations, controversy, pathogenesis, treatments, and outcomes. Sci Rep. 2020 Jan 31;10(1):1594. doi: 10.1038/s41598-020-58555-w.
https://doi.org/10.1038/s41598-020-58555...
). Another systematic review evaluated 286 patients from 136 studies and showed that 63% were women, 100% received hypoglycemic drugs, 60.84% received neuroleptics, and 84.86% showed complete resolution (44 Gómez-Ochoa SA, Espín-Chico BB, Pinilla-Monsalve GD, Kaas BM, Téllez-Mosquera LE. Clinical and neuroimaging spectrum of hyperglycemia-associated chorea-ballism: systematic review and exploratory analysis of case reports. Funct Neurol. 2018 Oct/Dec;33(4):175-87.). It is not clear whether there is any standard or specific treatment for cases of chorea associated with hyperglycemia, both regarding the prescription of anticonvulsants and regarding the prescription of insulin alone or in combination with other antihyperglycemic drugs (33 Chua CB, Sun CK, Hsu CW, Tai YC, Liang CY, Tsai IT. "Diabetic striatopathy": clinical presentations, controversy, pathogenesis, treatments, and outcomes. Sci Rep. 2020 Jan 31;10(1):1594. doi: 10.1038/s41598-020-58555-w.
https://doi.org/10.1038/s41598-020-58555...
,55 Oh SH, Lee KY, Im JH, Lee MS. Chorea associated with non-ketotic hyperglycemia and hyperintensity basal ganglia lesion on T1-weighted brain MRI study: a meta-analysis of 53 cases including four present cases. J Neurol Sci. 2002 Aug 15;200(1-2):57-62. doi: 10.1016/s0022-510x(02)00133-8.
https://doi.org/10.1016/s0022-510x(02)00...
).
We report the case of a patient diagnosed with diabetes mellitus at presentation with hyperglycemia-induced hemichorea-hemiballismus syndrome. We also conducted a systematic review of clinical and radiological features, treatment, and prognosis.
MATERIALS AND METHODS
Information sources
We searched MEDLINE/PubMed, EMBASE, Cochrane, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Web of Science, Scopus, and LILACS databases for articles published from inception to April 23, 2021. We set no language restrictions. A research librarian developed the search strategy. Our search did not include any gray literature. The complete search strategy is provided in Table 1.
Study selection
The results of the database searches were compiled using Rayyan software, and two reviewers (MH and VW) independently screened titles and abstracts using a standardized form for data extraction, and then screened candidate full-text articles for selection based on our inclusion and exclusion criteria. Full texts of all potential studies for inclusion were retrieved and independently assessed by other two reviewers (PB and VB). Any disagreements between reviewers at any stage were resolved by consulting a third independent reviewer (RPB).
Studies eligible for inclusion in this review were case reports and case series of adults (aged ≥ 18 years) that described hyperglycemic chorea with measurement of glycated hemoglobin (HbA1c) and cranial MRI. Studies were excluded if participants were pregnant women, aged < 18 years, and had no description of chorea and/or physical examination. If articles were not available, we contacted the corresponding authors. Decompensated diabetes was defined as HbA1c > 8% or capillary blood glucose > 200 mg/dL.
For studies meeting eligibility, data extracted included age of patient(s), laboratory and clinical data, MRI findings, treatment performed, type of diabetes, time from diagnosis, and study country. The flowchart of studies selection process is summarized in figure 1.
Data analysis
Narrative and quantitative syntheses were performed to describe the results. Data were analyzed in SPSS. Parametric data were presented as mean (SD), and nonparametric data as median (IQR). P values of less than 0.05 and 95% CIs were considered statistically significant.
RESULTS
Case report
A 62-year-old female patient was seen in the emergency department of a tertiary care hospital reporting that two days ago she started walking unsteadily and one day ago she presented uncoordinated and involuntary left hemi body movements with progressive worsening, maintaining a preserved level of consciousness. In addition, dysarthria and tremors appeared in the left hemiface. She reported a history of pre-diabetes for four years, and was taking metformin (850 mg twice a day) with no recent medical follow-up. She also presented systemic arterial hypertension and atrial fibrillation, both under treatment. Upon arrival, she was alert, oriented, sweating, capillary blood glucose was 136 mg/dL, heart rate (HR) was 140-160 bpm, normal cardiac and pulmonary auscultations, no abnormality in the abdominal exam. Intravenous diazepam 5 mg was administered with improvement. Initial laboratory tests revealed glycemia 127 mg/dL, creatinine 1.11 mg/dL (glomerular filtration rate 53 mL/min/1.73 m2), bicarbonate 16 mEq/L (reference value: 23-31 mEq/L), sodium 146 mEq/L (reference value:136-145 mEq/L), potassium 4.3 mEq/L (reference value: 3.5-5.1 mEq/L), calcium 10 mg/dL (reference value: 8.4-10.2 mg/dL), hemoglobin 12.4. Serologies for HIV, hepatitis C, hepatitis B and syphilis were all negative. Brain CT showed areas of increased attenuation in the striated bodies, suggesting the possibility of non-ketotic hyperglycemia as the cause of the symptoms, with no visible expansive lesion or intracranial collections. A lumbar puncture was performed with cerebrospinal fluid showing 1 leukocyte/uL (reference value: up to 5/uL), no germs, protein 29.6 mg/dL (reference value: up to 40 mg/dL). Electrocardiogram showed atrial fibrillation. The patient underwent brain MRI with intravenous injection of gadolinium contrast, demonstrating T1 hypersignal with a component of hypo signal in T2/FLAIR. Glycated hemoglobin (HbA1c) was also evaluated, which was 12.7% (reference value: < 5.7%). During hospitalization she was started on risperidone 2 mg twice a day, with progressive improvement of motor symptoms, later reduced to 1 mg twice a day. Metformin was also adjusted to 1,000 mg twice a day and NPH insulin was introduced twice a day, 14 IU before breakfast and 10 IU at 10 pm. Patient returned to the outpatient clinic two months after hospital discharge, reporting no symptoms, with no recurrence of hemichorea. She maintained good adherence to the treatment, presenting HbA1c 8.2%.
Literature review
The initial search yielded 774 records, 547 of which remained after adjusting for duplicates. After title and abstract screening, 249 studies were retrieved for full-text review, 118 of which met the inclusion criteria. Another 3 full-text articles cited in the initially screened texts were considered eligible, bringing the total number of included studies to 121, for a total of 214 cases.
Table 2 shows the characteristics of patients in the reported cases, according to sex. Most patients were women (65.3%). The median age was 71 years, and 67.3% were over 65 years of age. The majority of the included studies were published in Asia (67.3%), with South Korea being the country with the largest number of reported cases (n = 45). Almost all patients had decompensated diabetes (97.2%) on hospital arrival, and in 22% of them the diagnosis was made when the patient presented to the emergency department with chorea. The most common MRI finding was abnormalities of the basal ganglia (89.2%), with only 5.2% of cases with normal MRI.
Regarding publication dates, there was an increase in reports in recent years: 5 case reports were published from 1994 to 2000, 25 from 2001 to 2010, 90 from 2011 to 2020, and 2 in 2021, in addition to the present case report.
Regarding patient recovery, there was no difference between treatment with insulin alone and in combination with other medications (p 1.0). Also, no difference was found between insulin alone and insulin with haloperidol, insulin with haloperidol and benzodiazepine, or insulin with benzodiazepine (p 0.358).
DISCUSSION
Nonketotic hyperglycemic hemichorea is a poorly recognized entity, with few studies and a probably underestimated incidence. In the last two decades, the prevalence of adults with diabetes has increased from 4.6% to 10.5% of the global population (66 Saeedi P, Petersohn I, Salpea P, Malanda B, Karuranga S, Unwin N, et al. Global and regional diabetes prevalence estimates for 2019 and projections for 2030 and 2045: Results from the International Diabetes Federation Diabetes Atlas, 9th edition. Diabetes Res Clin Pract. 2019 Nov;157:107843. doi: 10.1016/j.diabres.2019.107843.
https://doi.org/10.1016/j.diabres.2019.1...
). Likewise, there has been an increase in reports of hyperglycemic chorea published over the years. However, whether the number of diagnoses has increased or cases are just being increasingly recognized and reported remains unclear.
In our study, 61 patients (22%) presented with symptoms of chorea as the first presentation of diabetes. This is interesting as it indicates that hyperglycemia should always be suspected in these cases. A recent study showed similar data: 17% of chorea cases also had newly diagnosed diabetes (33 Chua CB, Sun CK, Hsu CW, Tai YC, Liang CY, Tsai IT. "Diabetic striatopathy": clinical presentations, controversy, pathogenesis, treatments, and outcomes. Sci Rep. 2020 Jan 31;10(1):1594. doi: 10.1038/s41598-020-58555-w.
https://doi.org/10.1038/s41598-020-58555...
).
It is known that long-term complications of diabetes, both microvascular and macrovascular, are more common in people with long-standing poor glycemic control (77 Rawshani A, Rawshani A, Franzén S, Sattar N, Eliasson B, Svensson AM, et al. Risk Factors, Mortality, and Cardiovascular Outcomes in Patients with Type 2 Diabetes. N Engl J Med. 2018 Aug 16;379(7):633-644. doi: 10.1056/NEJMoa1800256.
https://doi.org/10.1056/NEJMoa1800256...
). Although chorea cannot be considered a complication of diabetes, we observed that, regarding glycemic control, 97% of the cases in which the two conditions were associated had blood glucose levels > 200 mg/dL or HbA1c > 8% (55 Oh SH, Lee KY, Im JH, Lee MS. Chorea associated with non-ketotic hyperglycemia and hyperintensity basal ganglia lesion on T1-weighted brain MRI study: a meta-analysis of 53 cases including four present cases. J Neurol Sci. 2002 Aug 15;200(1-2):57-62. doi: 10.1016/s0022-510x(02)00133-8.
https://doi.org/10.1016/s0022-510x(02)00...
,88 Cho HS, Hong CT, Chan L. Hemichorea after hyperglycemia correction: A case report and a short review of hyperglycemia-related hemichorea at the euglycemic state. Medicine (Baltimore). 2018 Mar;97(10):e0076. doi: 10.1097/MD.0000000000010076.
https://doi.org/10.1097/MD.0000000000010...
). Although the exact mechanism of chorea associated with hyperglycemia and/or diabetes is unknown, in hyperglycemia, the brain metabolism is known to shift to anaerobic pathways, with inactivation of Krebs cycle. In this setting, new substrates are used by the brain, such as gamma-aminobutyric acid (GABA), which may be involved in the genesis of basal ganglia dysfunction and result in disinhibition of the subthalamus and basal ganglia, thus leading to the involuntary movements characteristic of chorea (99 Guisado R, Arieff AI. Neurologic manifestations of diabetic comas: Correlation with biochemical alterations in the brain. Metabolism. 1975 May;24(5):665-79. doi: 10.1016/0026-0495(75)90146-8.
https://doi.org/10.1016/0026-0495(75)901...
). However, this hypothesis does not consider circumstances where hyperglycemia is corrected but clinical symptoms are not quickly reversed or even worsen. This may occur by a mechanism similar to that of diabetic retinopathy that worsens with rapid normalization of blood glucose levels (1010 Abe Y, Yamamoto T, Soeda T, Kumagai T, Tanno Y, Kubo J, et al. Diabetic Striatal Disease: Clinical Presentation, Neuroimaging, and Pathology. Intern Med. 2009;48(13):1135-41. doi: 10.2169/internalmedicine.48.1996.
https://doi.org/10.2169/internalmedicine...
).
Most reports included in this review describe patients from Asian countries, consistent with the literature (55 Oh SH, Lee KY, Im JH, Lee MS. Chorea associated with non-ketotic hyperglycemia and hyperintensity basal ganglia lesion on T1-weighted brain MRI study: a meta-analysis of 53 cases including four present cases. J Neurol Sci. 2002 Aug 15;200(1-2):57-62. doi: 10.1016/s0022-510x(02)00133-8.
https://doi.org/10.1016/s0022-510x(02)00...
,1111 Lin JJ, Lin GY, Shih C, Shen WC. Presentation of striatal hyperintensity on T1-weighted MRI in patients with hemiballism-hemichorea caused by non-ketotic hyperglycemia: Report of seven new cases and a review of literature. J Neurol. 2001 Sep;248(9):750-5. doi: 10.1007/s004150170089.
https://doi.org/10.1007/s004150170089...
,1212 Wang W, Tang X, Feng H, Sun F, Liu L, Rajah GB, et al. Clinical manifestation of non-ketotic hyperglycemia chorea: A case report and literature review. Medicine (Baltimore). 2020 May 29;99(22):e19801. doi: 10.1097/MD.0000000000019801.
https://doi.org/10.1097/MD.0000000000019...
). However, such data may be due only to reporting bias. There are no clear data in the literature with appropriate genetic analyses linking the occurrence of chorea associated with hyperglycemia to genetic or family profiles.
Diabetes is estimated to affect more than 500 million adults aged 20-79 years worldwide (1313 Sun H, Saeedi P, Karuranga S, Pinkepank M, Ogurtsova K, Duncan BB, et al. IDF Diabetes Atlas: Global, regional and country-level diabetes prevalence estimates for 2021 and projections for 2045. Diabetes Res Clin Pract. 2022 Jan;183:109119. doi: 10.1016/j.diabres.2021.109119.
https://doi.org/10.1016/j.diabres.2021.1...
), affecting non-Hispanic whites in 7.1% of cases, Asian Americans in 8.4%, Hispanic Americans in 11.8%, non-Hispanic blacks in 12.6%, and Native Americans in 33% (1414 Spanakis EK, Golden SH. Race/Ethnic Difference in Diabetes and Diabetic Complications. Curr Diab Rep. 2013 Dec;13(6):814-23. doi: 10.1007/s11892-013-0421-9.
https://doi.org/10.1007/s11892-013-0421-...
). The prevalence of diabetes is similar in men and women, being higher in those aged 75-79 years (1313 Sun H, Saeedi P, Karuranga S, Pinkepank M, Ogurtsova K, Duncan BB, et al. IDF Diabetes Atlas: Global, regional and country-level diabetes prevalence estimates for 2021 and projections for 2045. Diabetes Res Clin Pract. 2022 Jan;183:109119. doi: 10.1016/j.diabres.2021.109119.
https://doi.org/10.1016/j.diabres.2021.1...
). Regarding complications, women with diabetes, especially postmenopausal women, tend to be at higher cardiovascular risk than men with diabetes in the same age group (1515 Seghieri G, Policardo L, Anichini R, Franconi F, Campesi I, Cherchi S, et al. The Effect of Sex and Gender on Diabetic Complications. Curr Diabetes Rev. 2017;13(2):148-60. doi: 10.2174/1573399812666160517115756.
https://doi.org/10.2174/1573399812666160...
). In line with this, our study showed a higher prevalence of chorea in older women, data similar to those reported in the literature (33 Chua CB, Sun CK, Hsu CW, Tai YC, Liang CY, Tsai IT. "Diabetic striatopathy": clinical presentations, controversy, pathogenesis, treatments, and outcomes. Sci Rep. 2020 Jan 31;10(1):1594. doi: 10.1038/s41598-020-58555-w.
https://doi.org/10.1038/s41598-020-58555...
,55 Oh SH, Lee KY, Im JH, Lee MS. Chorea associated with non-ketotic hyperglycemia and hyperintensity basal ganglia lesion on T1-weighted brain MRI study: a meta-analysis of 53 cases including four present cases. J Neurol Sci. 2002 Aug 15;200(1-2):57-62. doi: 10.1016/s0022-510x(02)00133-8.
https://doi.org/10.1016/s0022-510x(02)00...
).
Population aging leads to a larger number of neurodegenerative disorders due to the accumulation of nuclear DNA (nDNA) damage to neurons in the cerebral cortex and hippocampus, as well as oxidative damage to biomolecules that lead to a chronic inflammatory response (1616 GBD 2017 US Neurological Disorders Collaborators; Feigin VL, Vos T, Alahdab F, Amit AML, Bärnighausen TW, Beghi E, et al. Burden of Neurological Disorders Across the US From 1990-2017: A Global Burden of Disease Study. JAMA Neurol. 2021 Feb 1;78(2):165-76. doi: 10.1001/jamaneurol.2020.4152.
https://doi.org/10.1001/jamaneurol.2020....
). Considering all these factors, we can infer that older patients with diabetes are even more likely to develop diabetes-related neurological complications, including hyperglycemic chorea.
In conclusion, recognizing this rare complication of diabetes is important, as early diagnosis and management will result in resolution of symptoms and better outcomes, avoiding unnecessary investigations.
REFERENCES
-
1Bedwell SF. Some observations on hemiballismus. Neurology. 1960 Jun:10:619-22. doi: 10.1212/wnl.10.6.619.
» https://doi.org/10.1212/wnl.10.6.619 -
2Xiao F, Liu M, Wang X. Involuntary choreiform movements in a diabetic patient. Lancet. 2019 Mar;393(10175):1033. doi: 10.1016/S0140-6736(19)30304-6.
» https://doi.org/10.1016/S0140-6736(19)30304-6 -
3Chua CB, Sun CK, Hsu CW, Tai YC, Liang CY, Tsai IT. "Diabetic striatopathy": clinical presentations, controversy, pathogenesis, treatments, and outcomes. Sci Rep. 2020 Jan 31;10(1):1594. doi: 10.1038/s41598-020-58555-w.
» https://doi.org/10.1038/s41598-020-58555-w -
4Gómez-Ochoa SA, Espín-Chico BB, Pinilla-Monsalve GD, Kaas BM, Téllez-Mosquera LE. Clinical and neuroimaging spectrum of hyperglycemia-associated chorea-ballism: systematic review and exploratory analysis of case reports. Funct Neurol. 2018 Oct/Dec;33(4):175-87.
-
5Oh SH, Lee KY, Im JH, Lee MS. Chorea associated with non-ketotic hyperglycemia and hyperintensity basal ganglia lesion on T1-weighted brain MRI study: a meta-analysis of 53 cases including four present cases. J Neurol Sci. 2002 Aug 15;200(1-2):57-62. doi: 10.1016/s0022-510x(02)00133-8.
» https://doi.org/10.1016/s0022-510x(02)00133-8 -
6Saeedi P, Petersohn I, Salpea P, Malanda B, Karuranga S, Unwin N, et al. Global and regional diabetes prevalence estimates for 2019 and projections for 2030 and 2045: Results from the International Diabetes Federation Diabetes Atlas, 9th edition. Diabetes Res Clin Pract. 2019 Nov;157:107843. doi: 10.1016/j.diabres.2019.107843.
» https://doi.org/10.1016/j.diabres.2019.107843 -
7Rawshani A, Rawshani A, Franzén S, Sattar N, Eliasson B, Svensson AM, et al. Risk Factors, Mortality, and Cardiovascular Outcomes in Patients with Type 2 Diabetes. N Engl J Med. 2018 Aug 16;379(7):633-644. doi: 10.1056/NEJMoa1800256.
» https://doi.org/10.1056/NEJMoa1800256 -
8Cho HS, Hong CT, Chan L. Hemichorea after hyperglycemia correction: A case report and a short review of hyperglycemia-related hemichorea at the euglycemic state. Medicine (Baltimore). 2018 Mar;97(10):e0076. doi: 10.1097/MD.0000000000010076.
» https://doi.org/10.1097/MD.0000000000010076 -
9Guisado R, Arieff AI. Neurologic manifestations of diabetic comas: Correlation with biochemical alterations in the brain. Metabolism. 1975 May;24(5):665-79. doi: 10.1016/0026-0495(75)90146-8.
» https://doi.org/10.1016/0026-0495(75)90146-8 -
10Abe Y, Yamamoto T, Soeda T, Kumagai T, Tanno Y, Kubo J, et al. Diabetic Striatal Disease: Clinical Presentation, Neuroimaging, and Pathology. Intern Med. 2009;48(13):1135-41. doi: 10.2169/internalmedicine.48.1996.
» https://doi.org/10.2169/internalmedicine.48.1996 -
11Lin JJ, Lin GY, Shih C, Shen WC. Presentation of striatal hyperintensity on T1-weighted MRI in patients with hemiballism-hemichorea caused by non-ketotic hyperglycemia: Report of seven new cases and a review of literature. J Neurol. 2001 Sep;248(9):750-5. doi: 10.1007/s004150170089.
» https://doi.org/10.1007/s004150170089 -
12Wang W, Tang X, Feng H, Sun F, Liu L, Rajah GB, et al. Clinical manifestation of non-ketotic hyperglycemia chorea: A case report and literature review. Medicine (Baltimore). 2020 May 29;99(22):e19801. doi: 10.1097/MD.0000000000019801.
» https://doi.org/10.1097/MD.0000000000019801 -
13Sun H, Saeedi P, Karuranga S, Pinkepank M, Ogurtsova K, Duncan BB, et al. IDF Diabetes Atlas: Global, regional and country-level diabetes prevalence estimates for 2021 and projections for 2045. Diabetes Res Clin Pract. 2022 Jan;183:109119. doi: 10.1016/j.diabres.2021.109119.
» https://doi.org/10.1016/j.diabres.2021.109119 -
14Spanakis EK, Golden SH. Race/Ethnic Difference in Diabetes and Diabetic Complications. Curr Diab Rep. 2013 Dec;13(6):814-23. doi: 10.1007/s11892-013-0421-9.
» https://doi.org/10.1007/s11892-013-0421-9 -
15Seghieri G, Policardo L, Anichini R, Franconi F, Campesi I, Cherchi S, et al. The Effect of Sex and Gender on Diabetic Complications. Curr Diabetes Rev. 2017;13(2):148-60. doi: 10.2174/1573399812666160517115756.
» https://doi.org/10.2174/1573399812666160517115756 -
16GBD 2017 US Neurological Disorders Collaborators; Feigin VL, Vos T, Alahdab F, Amit AML, Bärnighausen TW, Beghi E, et al. Burden of Neurological Disorders Across the US From 1990-2017: A Global Burden of Disease Study. JAMA Neurol. 2021 Feb 1;78(2):165-76. doi: 10.1001/jamaneurol.2020.4152.
» https://doi.org/10.1001/jamaneurol.2020.4152
SUPPLEMENTARY MATERIAL
Publication Dates
-
Publication in this collection
07 June 2024 -
Date of issue
2024
History
-
Received
11 May 2023 -
Accepted
21 July 2023