Effect of a test-and-treat approach to vitamin D supplementation on risk of all cause acute respiratory tract infection and covid-19: phase 3 randomised controlled trial (CORONAVIT).
BMJ. 2022 Sep 7;378:e071230. doi: 10.1136/bmj-2022-071230.
BMJ. 2022.
PMID: 36215226
Free PMC article.
Clinical Trial.