Prevalence of people with sickle cell disease and leg ulcers in Brazil: Socioeconomic and clinical overview. - Spira, Josimare Aparecida Otoni; Borges, Eline Lima; Guedes, Antônio Carlos Martins; Andrade, Paula Gabriela Ribeiro; Lima, Vera Lúcia de Araújo Nogueira (PLoS ONE, 2022)