https://nauka.offnews.bg/news/Novini_1/Nad-80-ot-patcientite-s-COVID-19-imat-defitcit-na-vitamin-D_158944.html
Коментари
https://nauka.offnews.bg/news/Novini_1/Nad-80-ot-patcientite-s-COVID-19-imat-defitcit-na-vitamin-D_158944.html