COVID-19 infection in sickle cell patients in a developing country: a case series - Pinto, Ana Cristina Silva; Oliveira, Letícia Santos de; Santos, Flávia Leite Souza; Haddad, Simone Kashima; De Santis, Gil Cunha; Calado, Rodrigo Tocantins (Acta Haematologica, 2021)