SANT'ANNA, Anadayr L.M., et al. “ Study of Chronic Hemolytic Anaemia Patients in Rio De Janeiro: Prevalence of Anti-Human Parvovirus B19 IgG Antibodies and the Developement Aplastic Crises ”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 44, no. 4, July 2002, pp. 187-90, https://revistas.usp.br/rimtsp/article/view/30621.