Covid-19 and vit-d: Disease mortality negatively correlates with sunlight exposure
Spatial and Spatio-temporal Epidemiology (2020) - Comments
doi: 10.1016/j.sste.2020.100362  issn: 1877-5845 

Édouard Lansiaux, Philippe P. Pébaÿ, Jean-Laurent Picard, Joachim Son-Forget