1. Department of Medicine Faculdade de Medicina de São José do Rio Preto São Paulo São José do Rio Preto Brazil
2. Duke University School of Medicine Durham North Carolina USA
3. Duke Biostatistics, Epidemiology and Research Design Core Duke University School of Medicine Durham North Carolina USA
4. Department of Biostatistics and Bioinformatics Duke University School of Medicine Durham North Carolina USA
5. Division of Hematology, Department of Medicine Duke University School of Medicine Durham North Carolina USA