Do congenital bleeding disorders have a protective effect against COVID‐19? A prospective study. (30th November 2020) - Dorgalaleh, Akbar; Tabibian, Shadi; Mohammadamini, Mahboobeh; Bahraini, Mehran; Dabbagh, Ali; Noroozi‐Aghideh, Ali; Shams, Mahmood; Anvar, Ali; Namvar, Ali; Baghaipour, Mohammad Reza; Rad, Fariba; Azadi, Parviz