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Case–control study of serum vitamin D concentrations in hospitalised patients with COVID-19 and hospitalised controls suffering with respiratory tract infections of differing aetiology
- Correspondence to Dr Sameer Sighakoli, Department of Diabetes and Endocrinology, Medway Maritime Hospital, Gillingham, UK; sameer.sighakoli{at}nhs.net
Citation
Case–control study of serum vitamin D concentrations in hospitalised patients with COVID-19 and hospitalised controls suffering with respiratory tract infections of differing aetiology
Publication history
- Received January 19, 2022
- Accepted January 9, 2023
- First published March 22, 2023.
Online issue publication
June 28, 2023
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- Previous version (22 March 2023).
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© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. http://creativecommons.org/licenses/by-nc/4.0/This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.