Affiliation: | (1) Department of Internal Medicine, State University of Campinas, Campinas, São Paulo, Brazil;(2) Department of Digestive Surgery, State University of Campinas, Campinas, São Paulo, Brazil;(3) Haematology and Haemoterapy Centre, State University of Campinas, Campinas, São Paulo, Brazil;(4) Hemocentro-UNICAMP, Cidade Universitária Zenferino Vaz, Campinas, São Paulo, Brazil |