1. Department of Oncogenetics, A.C. Camargo Cancer Center, São Paulo, Brazil
2. International Research Center, A.C. Camargo Cancer Center, São Paulo, Brazil
3. Department of Head and Neck Surgery, A.C. Camargo Cancer Center, São Paulo, Brazil
4. Division of Cancer Epidemiology and Genetics, National Cancer Institute/National Institutes of Health, Bethesda, Maryland