AUTHOR=Speeckaert Marijn M. , Delanghe Joris R. TITLE=Commentary: Serum Vitamin D Levels Are Associated With Increased COVID-19 Severity and Mortality Independent of Whole-Body and Visceral Adiposity JOURNAL=Frontiers in Nutrition VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2022.885204 DOI=10.3389/fnut.2022.885204 ISSN=2296-861X