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https://celsogallicoimbra.com/2020/09/12/vitamina-d-associada-a-covid-19-menos-grave-ira-vitamin-d-associated-with-less-severe-covid-19-iran-aug-28-2020/
Vitamina D associada a COVID-19 menos grave (Irã) * Vitamin D associated with less severe COVID-19 (Iran) - Aug 28, 2020