Nature.com: Association between vitamin D supplementation and COVID-19 infection and mortality User sphereseeker, in the covidlonghaulers subreddit, 13 Sep 2023
Association between vitamin D supplementation and COVID-19 infection and mortality User kpfleger, in the CoronavirusUS subreddit, 14 Dec 2022
Association between vitamin D supplementation and COVID-19 infection and mortality | 12NOV22 User IIWIIM8, in the COVID-19, "nCoV" subreddit, 20 Nov 2022
Association between vitamin D supplementation and COVID‑19 infection and mortality User CallMeCassandra, in the COVID-19 subreddit, 20 Nov 2022