Association between Average Vitamin D Levels and COVID-19 Mortality in 19 European Countries—A Population-Based Study
Amar Ahmad(Cancer Research UK), R.T.D. Oliver(University of Cambridge), Christian Heumann(Ludwig-Maximilians-Universität München), Raghib Ali(University of Oxford), Nirmin F. Juber(New York University Abu Dhabi), Heba Al-Naseri(University of Southampton)
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