The role of vitamin D as a preventive strategy in COVID-19 infections: evidence from South Asia
Carukshi Arambepola, Ruwanika Seneviratne, Sumedha Wijeratne, Nalika Gunawardena, Ruwan Wijayamuni, Deepika Attygalle
doi:10.21203/rs.3.rs-3964082/v1
Background Regional evidence on prevention of COVID-19 and its sequalae by vitamin D remains inconclusive and sparse.
Aim/Objective This study aimed to determine the association between COVID-19 and Vitamin D de ciency among adults in Colombo District, Sri Lanka.
Methods A sex-matched case-control study was conducted among 104 RT-PCR-con rmed COVID-19 patients and 104 RT-PCR negative adults recruited from community. Non-fasting blood samples were analysed for serum 25(OH)D using chemiluminescence assay and vitamin D de ciency identi ed (< 50.0nmol/L).
Results Cases (34.2; SD = 15.4nmol/L) had signi cantly lower 25(OH)D compared to controls (39.8; SD = 17.8nmol/L) (p = 0.02) which persisted after adjustments (p = 0.02), along with Sinhalese ethnicity (p < 0.001). VDD was signi cantly more prevalent in cases (83.7% vs. 71.2%; crude odds ratio (OR) = 2.1; 95%-CI:1.1,4.1), although not an independent COVID-19 predictor (adjusted OR = 1.9; 95%-CI:0.6,5.7). A signi cantly lower 25(OH)D level was observed in moderate/severe cases (39.7; SD = 12.3nmol/L) vs mild (32.9; SD = 15.8nmol/L) (p = 0.015). Neither low serum concentrations nor de ciency showed an independent relationship with severity (p > 0.05). Diabetes was the sole predictor of COVID-19 severity (p = 0.022).
Conclusions Vitamin D has potential as a cost-effective primary, but not secondary, preventive strategy.
References
Alguwaihes, Sabico, Hasanato, Severe vitamin D de ciency is not related to SARS-CoV-2 infection but may increase mortality risk in hospitalized adults: a retrospective case-control study in an Arab Gulf country, Aging Clin Exp Res,
doi:10.1007/s40520-021-01831-0
Amaratunga, Fernando, Haigh, Jayasinghe, The COVID-19 outbreak in Sri Lanka: A synoptic analysis focusing on trends, impacts, risks and science-policy interaction processes, Prog Disaster Sci,
doi:10.1016/j.pdisas.2020.100133
Amer, Alotaibi, Vitamin D status of Arab Gulf residents screened for SARS-CoV-2 and its association with COVID-19 infection: a multi-centre case-control study, J Transl Med,
doi:10.1186/s12967-021-02838-x
Aranow, Vitamin D and the Immune System, Nih.gov
D'antiga, Coronaviruses and immunosuppressed patients: The facts during the third epidemic, Liver Transpl,
doi:10.1002/lt.25756
Greiller, Martineau, Modulation of the immune response to respiratory viruses by vitamin D, Nutrients,
doi:10.3390/nu7064240
Haugen, Chandyo, Ulak, 25-hydroxy-vitamin D concentration is not affected by severe or non-severe pneumonia, or in ammation, in young children, Nutrients,
doi:10.3390/nu9010052
Hernández, Nan, Fernandez-Ayala, Vitamin D status in hospitalized patients with SARS-CoV-2 infection, J Clin Endocrinol Metab,
doi:10.1210/clinem/dgaa733
Holick, Binkley, Bischoff-Ferrari, Evaluation, treatment, and prevention of vitamin D de ciency: An endocrine society clinical practice guideline, J Clin Endocrinol Metab,
doi:10.1210/jcem.96.12
Ilie, Stefanescu, Smith, The role of vitamin D in the prevention of coronavirus disease 2019 infection and mortality, Aging Clin Exp Res,
doi:10.1007/s40520-020-01570-8
Kaplan, Pesce, Clinical Chemistry: Theory, Analysis, Correlation
Kiyumi, Kalra, Davies, Kalhan, The impact of vitamin d de ciency on the severity of symptoms and mortality rate among adult patients with COVID-19: A systematic review and metaanalysis, Indian J Endocrinol Metab,
doi:10.4103/ijem.ijem_115_21
Lim, Bae, Kwon, Nauck, COVID-19 and diabetes mellitus: from pathophysiology to clinical management, Nat Rev Endocrinol,
doi:10.1038/s41574-020-00435-4
Luo, Liao, Shen, Li, Cheng, Vitamin D de ciency is associated with COVID-19 incidence and disease severity in Chinese people, J Nutr,
doi:10.1093/jn/nxaa332
Martineau, Jolliffe, Greenberg, Vitamin D supplementation to prevent acute respiratory infections: individual participant data meta-analysis, Health Technol Assess,
doi:10.3310/hta23020
Meltzer, Best, Zhang, Vokes, Arora et al., Association of vitamin D de ciency and treatment with COVID-19 incidence, bioRxiv,
doi:10.1101/2020.05.08.20095893
Merzon, Tworowski, Gorohovski, Low plasma 25(OH) vitamin D level is associated with increased risk of COVID-19 infection: an Israeli population-based study, FEBS J,
doi:10.1111/febs.15495
Nimavat, Singh, Singh, Singh, Sinha, Vitamin D de ciency and COVID-19: A case-control study at a tertiary care hospital in India, Ann Med Surg (Lond),
doi:10.1016/j.amsu.2021.102661
Nimitphong, Holick, Vitamin D status and sun exposure in southeast Asia, Dermatoendocrinol,
doi:10.4161/derm.24054
Pereira, Damascena, Azevedo, De Almeida Oliveira, Da et al., Vitamin D de ciency aggravates COVID-19: systematic review and meta-analysis, Crit Rev Food Sci Nutr,
doi:10.1080/10408398.2020.1841090
Petrilli, Jones, Yang, Factors associated with hospital admission and critical illness among 5279 people with coronavirus disease 2019 in New York City: prospective cohort study, BMJ,
doi:10.1136/bmj.m1966
Schlesselman, Case Control Studies: Design, Conduct, Analysis
Svensson, Hofmann, Häbel, Jernberg, Nordberg, Association between cardiometabolic disease and severe COVID-19: a nationwide case-control study of patients requiring invasive mechanical ventilation, BMJ Open,
doi:10.1136/bmjopen-2020-044486
Talebi, Nejad, Yaseri, Hadadi, Association of vitamin D status with the severity and mortality of community-acquired pneumonia in Iran during 2016-2017: A prospective cohort study, Reports of Biochemistry & Molecular Biology
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'abstract': '<jats:title>Abstract</jats:title>\n'
' <jats:p>Background\n'
' Regional evidence on prevention of COVID-19 and its sequalae by vitamin D remains '
'inconclusive and sparse.\n'
'Aim/Objective\n'
' This study aimed to determine the association between COVID-19 and Vitamin D deficiency '
'among adults in Colombo District, Sri Lanka.\n'
'Methods\n'
' A sex-matched case-control study was conducted among 104 RT-PCR-confirmed COVID-19 patients '
'and 104 RT-PCR negative adults recruited from community. Non-fasting blood samples were '
'analysed for serum 25(OH)D using chemiluminescence assay and vitamin D deficiency identified '
'(<\u200950.0nmol/L).\n'
'Results\n'
' Cases (34.2; SD\u2009=\u200915.4nmol/L) had significantly lower 25(OH)D compared to controls '
'(39.8; SD\u2009=\u200917.8nmol/L) (p\u2009=\u20090.02) which persisted after adjustments '
'(p\u2009=\u20090.02), along with Sinhalese ethnicity (p\u2009<\u20090.001). VDD was '
'significantly more prevalent in cases (83.7% vs. 71.2%; crude odds ratio (OR)\u2009=\u2009'
'2.1; 95%-CI:1.1,4.1), although not an independent COVID-19 predictor (adjusted OR\u2009=\u2009'
'1.9; 95%-CI:0.6,5.7). A significantly lower 25(OH)D level was observed in moderate/severe '
'cases (39.7; SD\u2009=\u200912.3nmol/L) vs mild (32.9; SD\u2009=\u200915.8nmol/L) (p\u2009'
'=\u20090.015). Neither low serum concentrations nor deficiency showed an independent '
'relationship with severity (p\u2009>\u20090.05). Diabetes was the sole predictor of '
'COVID-19 severity (p\u2009=\u20090.022).\n'
'Conclusions\n'
' Vitamin D has potential as a cost-effective primary, but not secondary, preventive '
'strategy.</jats:p>',
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'reference': [ { 'key': 'ref1',
'doi-asserted-by': 'publisher',
'author': 'Holick MF',
'year': '2011',
'unstructured': 'Holick MF, Binkley NC, Bischoff-Ferrari HA et al. Evaluation, treatment, '
'and prevention of vitamin D deficiency: An endocrine society clinical '
'practice guideline. J Clin Endocrinol Metab, 2011;96(12):3908, '
'https://doi.org/10.1210/jcem.96.12.zeg3908a. Erratum for J Clin '
'Endocrinol Metab, 2011;95(7);3352–3359, '
'https://doi.org/10.1210/jc.2010-0437.',
'DOI': '10.1210/jcem.96.12.zeg3908a'},
{ 'key': 'ref2',
'article-title': 'Vitamin D and the Immune System',
'author': 'Aranow C',
'unstructured': 'Aranow C. Vitamin D and the Immune System. Nih gov. '
'https://doi.org/10.231/JIM.0b013e31821b8755.',
'journal-title': 'Nih gov'},
{ 'key': 'ref3',
'doi-asserted-by': 'publisher',
'first-page': '4240',
'author': 'Greiller CL',
'unstructured': 'Greiller CL, Martineau AR, Nutrients. 7(6), 4240–70. '
'https://doi.org/10.3390/nu7064240.',
'DOI': '10.3390/nu7064240'},
{ 'issue': '5',
'key': 'ref4',
'doi-asserted-by': 'publisher',
'first-page': '1308',
'DOI': '10.1080/10408398.2020.1841090',
'article-title': 'Vitamin D deficiency aggravates COVID-19: systematic review and '
'meta-analysis',
'volume': '62',
'author': 'Pereira M',
'year': '2022',
'unstructured': 'Pereira M, Dantas Damascena A, Galvão Azevedo LM, de Almeida Oliveira T, '
'da Mota Santana J. Vitamin D deficiency aggravates COVID-19: systematic '
'review and meta-analysis. Crit Rev Food Sci Nutr. 2022;62(5):1308–16. '
'https://doi.org/10.1080/10408398.2020.1841090.',
'journal-title': 'Crit Rev Food Sci Nutr'},
{ 'issue': '4',
'key': 'ref5',
'doi-asserted-by': 'publisher',
'first-page': '561',
'DOI': '10.1016/j.dsx.2020.04.050',
'article-title': 'Vitamin D concentrations and COVID-19 infection in UK Biobank',
'volume': '14',
'author': 'Hastie CE',
'year': '2020',
'unstructured': 'Hastie CE, Mackay DF, Ho F, et al. Vitamin D concentrations and COVID-19 '
'infection in UK Biobank. Diabetes Metab Syndr. 2020;14(4):561–5. '
'https://doi.org/10.1016/j.dsx.2020.04.050.',
'journal-title': 'Diabetes Metab Syndr'},
{ 'issue': '3',
'key': 'ref6',
'doi-asserted-by': 'publisher',
'first-page': 'e1343',
'DOI': '10.1210/clinem/dgaa733',
'article-title': 'Vitamin D status in hospitalized patients with SARS-CoV-2 infection',
'volume': '106',
'author': 'Hernández JL',
'year': '2021',
'unstructured': 'Hernández JL, Nan D, Fernandez-Ayala M, et al. Vitamin D status in '
'hospitalized patients with SARS-CoV-2 infection. J Clin Endocrinol '
'Metab. 2021;106(3):e1343–53. https://doi.org/10.1210/clinem/dgaa733.',
'journal-title': 'J Clin Endocrinol Metab'},
{ 'issue': '4',
'key': 'ref7',
'doi-asserted-by': 'publisher',
'first-page': '261',
'DOI': '10.4103/ijem.ijem_115_21',
'article-title': 'The impact of vitamin d deficiency on the severity of symptoms and '
'mortality rate among adult patients with COVID-19: A systematic review '
'and meta-analysis',
'volume': '25',
'author': 'Al Kiyumi M',
'year': '2021',
'unstructured': 'Al Kiyumi M, Kalra S, Davies JS, Kalhan A. The impact of vitamin d '
'deficiency on the severity of symptoms and mortality rate among adult '
'patients with COVID-19: A systematic review and meta-analysis. Indian J '
'Endocrinol Metab. 2021;25(4):261. '
'https://doi.org/10.4103/ijem.ijem_115_21.',
'journal-title': 'Indian J Endocrinol Metab'},
{ 'issue': '100051',
'key': 'ref8',
'doi-asserted-by': 'publisher',
'first-page': '100051',
'DOI': '10.1016/j.medidd.2020.100051',
'article-title': 'COVID-19 Susceptibility: Is there any Correlation?',
'volume': '7',
'author': 'Razdan K',
'year': '2020',
'unstructured': 'Razdan K, Singh K, Singh D, Vitamin D, Levels. COVID-19 Susceptibility: '
'Is there any Correlation? Med Drug Discov. 2020;7(100051):100051. '
'https://doi.org/10.1016/j.medidd.2020.100051.',
'journal-title': 'Med Drug Discov'},
{ 'key': 'ref9',
'doi-asserted-by': 'publisher',
'DOI': '10.1136/bmj.m',
'article-title': 'Factors associated with hospital admission and critical illness among '
'5279 people with coronavirus disease 2019 in New York City: prospective '
'cohort study',
'author': 'Petrilli CM',
'year': '1966',
'unstructured': 'Petrilli CM, Jones SA, Yang J, et al. Factors associated with hospital '
'admission and critical illness among 5279 people with coronavirus '
'disease 2019 in New York City: prospective cohort study. BMJ. 1966. '
'https://doi.org/10.1136/bmj.m.',
'journal-title': 'BMJ'},
{ 'issue': '1',
'key': 'ref10',
'doi-asserted-by': 'publisher',
'first-page': '34',
'DOI': '10.4161/derm.24054',
'article-title': 'Vitamin D status and sun exposure in southeast Asia',
'volume': '5',
'author': 'Nimitphong H',
'year': '2013',
'unstructured': 'Nimitphong H, Holick MF. Vitamin D status and sun exposure in southeast '
'Asia. Dermatoendocrinol. 2013;5(1):34–7. '
'https://doi.org/10.4161/derm.24054.',
'journal-title': 'Dermatoendocrinol'},
{ 'key': 'ref11',
'doi-asserted-by': 'publisher',
'first-page': '68',
'DOI': '10.1016/j.amsu.2021.102661',
'article-title': 'Vitamin D deficiency and COVID-19: A case-control study at a tertiary '
'care hospital in India',
'author': 'Nimavat N',
'year': '2021',
'unstructured': 'Nimavat N, Singh S, Singh P, Singh SK, Sinha N. Vitamin D deficiency and '
'COVID-19: A case-control study at a tertiary care hospital in India. Ann '
'Med Surg (Lond). 2021;68. https://doi.org/10.1016/j.amsu.2021.102661.',
'journal-title': 'Ann Med Surg (Lond)'},
{ 'issue': '5',
'key': 'ref12',
'doi-asserted-by': 'publisher',
'first-page': '941',
'DOI': '10.1017/s0007114507844138',
'article-title': 'Vitamin D status in Sri Lankans living in Sri Lanka and Norway',
'volume': '99',
'author': 'Meyer HE',
'year': '2008',
'unstructured': 'Meyer HE, Holvik K, Lofthus CM, Tennakoon SUB. Vitamin D status in Sri '
'Lankans living in Sri Lanka and Norway. Br J Nutr. 2008;99(5):941–4. '
'https://doi.org/10.1017/s0007114507844138.',
'journal-title': 'Br J Nutr'},
{ 'issue': '100133',
'key': 'ref13',
'doi-asserted-by': 'publisher',
'first-page': '100133',
'DOI': '10.1016/j.pdisas.2020.100133',
'article-title': 'The COVID-19 outbreak in Sri Lanka: A synoptic analysis focusing on '
'trends, impacts, risks and science-policy interaction processes',
'volume': '8',
'author': 'Amaratunga D',
'year': '2020',
'unstructured': 'Amaratunga D, Fernando N, Haigh R, Jayasinghe N. The COVID-19 outbreak '
'in Sri Lanka: A synoptic analysis focusing on trends, impacts, risks and '
'science-policy interaction processes. Prog Disaster Sci. '
'2020;8(100133):100133. https://doi.org/10.1016/j.pdisas.2020.100133.',
'journal-title': 'Prog Disaster Sci'},
{ 'key': 'ref14',
'volume-title': 'Case Control Studies: Design, Conduct, Analysis',
'author': 'Schlesselman JJ',
'year': '1982',
'unstructured': 'Schlesselman JJ. Case Control Studies: Design, Conduct, Analysis. Oxford '
'University Press; 1982.'},
{ 'key': 'ref15',
'unstructured': 'Food and Drug Administration. COVID-19: Developing drugs and biological '
'products for treatment or prevention [WWW Document]. 2021. Food and Drug '
'Administration. fda.gov. https://www.fda.gov/media/167274/download '
'(accessed 11.9.23).'},
{ 'key': 'ref16',
'volume-title': 'Clinical Chemistry: Theory, Analysis, Correlation. 2010. Mosby',
'author': 'Kaplan LA',
'unstructured': 'Kaplan LA, Pesce AJ. Clinical Chemistry: Theory, Analysis, Correlation. '
'2010. Mosby. Vol 489. Elsevier.'},
{ 'issue': '17',
'key': 'ref17',
'doi-asserted-by': 'publisher',
'first-page': '3693',
'DOI': '10.1111/febs.15495',
'article-title': 'Low plasma 25(OH) vitamin D level is associated with increased risk of '
'COVID-19 infection: an Israeli population‐based study',
'volume': '287',
'author': 'Merzon E',
'year': '2020',
'unstructured': 'Merzon E, Tworowski D, Gorohovski A, et al. Low plasma 25(OH) vitamin D '
'level is associated with increased risk of COVID-19 infection: an '
'Israeli population‐based study. FEBS J. 2020;287(17):3693–702. '
'https://doi.org/10.1111/febs.15495.',
'journal-title': 'FEBS J'},
{ 'issue': '5',
'key': 'ref18',
'doi-asserted-by': 'publisher',
'first-page': '1415',
'DOI': '10.1007/s40520-021-01831-0',
'article-title': 'Severe vitamin D deficiency is not related to SARS-CoV-2 infection but '
'may increase mortality risk in hospitalized adults: a retrospective '
'case–control study in an Arab Gulf country',
'volume': '33',
'author': 'Alguwaihes AM',
'year': '2021',
'unstructured': 'Alguwaihes AM, Sabico S, Hasanato R, et al. Severe vitamin D deficiency '
'is not related to SARS-CoV-2 infection but may increase mortality risk '
'in hospitalized adults: a retrospective case–control study in an Arab '
'Gulf country. Aging Clin Exp Res. 2021;33(5):1415–22. '
'https://doi.org/10.1007/s40520-021-01831-0.',
'journal-title': 'Aging Clin Exp Res'},
{ 'issue': '1',
'key': 'ref19',
'doi-asserted-by': 'publisher',
'DOI': '10.1186/s12967-021-02838-x',
'article-title': 'Vitamin D status of Arab Gulf residents screened for SARS-CoV-2 and its '
'association with COVID-19 infection: a multi-centre case–control study',
'volume': '19',
'author': 'Al-Daghri NM',
'year': '2021',
'unstructured': 'Al-Daghri NM, Amer OE, Alotaibi NH, et al. Vitamin D status of Arab Gulf '
'residents screened for SARS-CoV-2 and its association with COVID-19 '
'infection: a multi-centre case–control study. J Transl Med. 2021;19(1). '
'https://doi.org/10.1186/s12967-021-02838-x.',
'journal-title': 'J Transl Med'},
{ 'issue': '1',
'key': 'ref20',
'doi-asserted-by': 'publisher',
'first-page': '98',
'DOI': '10.1093/jn/nxaa332',
'article-title': 'Vitamin D deficiency is associated with COVID-19 incidence and disease '
'severity in Chinese people',
'volume': '151',
'author': 'Luo X',
'year': '2021',
'unstructured': 'Luo X, Liao Q, Shen Y, Li H, Cheng L. Vitamin D deficiency is associated '
'with COVID-19 incidence and disease severity in Chinese people. J Nutr. '
'2021;151(1):98–103. 10.1093/jn/nxaa332.',
'journal-title': 'J Nutr'},
{ 'key': 'ref21',
'doi-asserted-by': 'publisher',
'article-title': 'Association of vitamin D deficiency and treatment with COVID-19 '
'incidence',
'author': 'Meltzer DO',
'unstructured': 'Meltzer DO, Best TJ, Zhang H, Vokes T, Arora V, Solway J. Association of '
'vitamin D deficiency and treatment with COVID-19 incidence. bioRxiv. '
'https://doi.org/10.1101/2020.05.08.20095893.',
'DOI': '10.1101/2020.05.08.20095893'},
{ 'issue': '7',
'key': 'ref22',
'doi-asserted-by': 'publisher',
'first-page': '1195',
'DOI': '10.1007/s40520-020-01570-8',
'article-title': 'The role of vitamin D in the prevention of coronavirus disease 2019 '
'infection and mortality',
'volume': '32',
'author': 'Ilie PC',
'year': '2020',
'unstructured': 'Ilie PC, Stefanescu S, Smith L. The role of vitamin D in the prevention '
'of coronavirus disease 2019 infection and mortality. Aging Clin Exp Res. '
'2020;32(7):1195–8. https://doi.org/10.1007/s40520-020-01570-8.',
'journal-title': 'Aging Clin Exp Res'},
{ 'issue': '105101',
'key': 'ref23',
'doi-asserted-by': 'publisher',
'first-page': '105101',
'DOI': '10.1016/j.meegid.2021.105101',
'article-title': 'Role of multiple factors likely contributing to severity-mortality of '
'COVID-19',
'volume': '96',
'author': 'Singh J',
'year': '2021',
'unstructured': 'Singh J, Alam A, Samal J, et al. Role of multiple factors likely '
'contributing to severity-mortality of COVID-19. Infect Genet Evol. '
'2021;96(105101):105101. https://doi.org/10.1016/j.meegid.2021.105101.',
'journal-title': 'Infect Genet Evol'},
{ 'issue': '1',
'key': 'ref24',
'doi-asserted-by': 'publisher',
'first-page': '52',
'DOI': '10.3390/nu9010052',
'article-title': '25-hydroxy-vitamin D concentration is not affected by severe or '
'non-severe pneumonia, or inflammation, in young children',
'volume': '9',
'author': 'Haugen J',
'year': '2017',
'unstructured': 'Haugen J, Chandyo R, Ulak M, et al. 25-hydroxy-vitamin D concentration '
'is not affected by severe or non-severe pneumonia, or inflammation, in '
'young children. Nutrients. 2017;9(1):52. '
'https://doi.org/10.3390/nu9010052.',
'journal-title': 'Nutrients'},
{ 'issue': '2',
'key': 'ref25',
'doi-asserted-by': 'publisher',
'first-page': '1',
'DOI': '10.3310/hta23020',
'article-title': 'Vitamin D supplementation to prevent acute respiratory infections: '
'individual participant data meta-analysis',
'volume': '23',
'author': 'Martineau AR',
'year': '2019',
'unstructured': 'Martineau AR, Jolliffe DA, Greenberg L, et al. Vitamin D supplementation '
'to prevent acute respiratory infections: individual participant data '
'meta-analysis. Health Technol Assess. 2019;23(2):1–44. '
'https://doi.org/10.3310/hta23020.',
'journal-title': 'Health Technol Assess'},
{ 'issue': '1',
'key': 'ref26',
'first-page': '85',
'article-title': 'Association of vitamin D status with the severity and mortality of '
'community-acquired pneumonia in Iran during 2016–2017: A prospective '
'cohort study',
'volume': '8',
'author': 'Talebi F',
'year': '2019',
'unstructured': 'Talebi F, Nejad MR, Yaseri M, Hadadi A. Association of vitamin D status '
'with the severity and mortality of community-acquired pneumonia in Iran '
'during 2016–2017: A prospective cohort study. Rep Biochem Mol Biology. '
'2019;8(1):85.',
'journal-title': 'Rep Biochem Mol Biology'},
{ 'issue': '6',
'key': 'ref27',
'doi-asserted-by': 'publisher',
'first-page': '832',
'DOI': '10.1002/lt.25756',
'article-title': 'Coronaviruses and immunosuppressed patients: The facts during the third '
'epidemic',
'volume': '26',
'author': 'D’Antiga L',
'year': '2020',
'unstructured': 'D’Antiga L. Coronaviruses and immunosuppressed patients: The facts '
'during the third epidemic. Liver Transpl. 2020;26(6):832–4. '
'https://doi.org/10.1002/lt.25756.',
'journal-title': 'Liver Transpl'},
{ 'issue': '2',
'key': 'ref28',
'doi-asserted-by': 'publisher',
'first-page': 'e044486',
'DOI': '10.1136/bmjopen-2020-044486',
'article-title': 'Association between cardiometabolic disease and severe COVID-19: a '
'nationwide case–control study of patients requiring invasive mechanical '
'ventilation',
'volume': '11',
'author': 'Svensson P',
'year': '2021',
'unstructured': 'Svensson P, Hofmann R, Häbel H, Jernberg T, Nordberg P. Association '
'between cardiometabolic disease and severe COVID-19: a nationwide '
'case–control study of patients requiring invasive mechanical '
'ventilation. BMJ Open. 2021;11(2):e044486. '
'https://doi.org/10.1136/bmjopen-2020-044486.',
'journal-title': 'BMJ Open'},
{ 'issue': '1',
'key': 'ref29',
'doi-asserted-by': 'publisher',
'first-page': '11',
'DOI': '10.1038/s41574-020-00435-4',
'article-title': 'COVID-19 and diabetes mellitus: from pathophysiology to clinical '
'management',
'volume': '17',
'author': 'Lim S',
'year': '2021',
'unstructured': 'Lim S, Bae JH, Kwon HS, Nauck MA. COVID-19 and diabetes mellitus: from '
'pathophysiology to clinical management. Nat Rev Endocrinol. '
'2021;17(1):11–30. https://doi.org/10.1038/s41574-020-00435-4.',
'journal-title': 'Nat Rev Endocrinol'},
{ 'key': 'ref30',
'author': 'Sri Lanka STEPS',
'unstructured': 'Ministry of Health, Sri Lanka STEPS. Survey 2021 Fact Sheet. Gov.lk. '
'https://www.ncd.health.gov.lk/images/pdf/Steps-Fact-Sheet.pdf.'}],
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