1. Hematology and Hemotherapy Center - University of Campinas/Hemocentro - Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, São Paulo, Brazil
2. Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA
3. Howard Hughes Medical Institute, Portland, Oregon, USA
4. Current address: Department of Internal Medicine, University of São Paulo at Ribeirão Preto Medical School, Ribeirão Preto, São Paulo, Brazil
5. Current address: Department of Biological Sciences, Federal University of São Paulo, Diadema, São Paulo, Brazil