1. Department of Statistics Federal University of São Carlos São Carlos São Paulo Brazil
2. Institute of Mathematical and Statistics Federal University of Goiás Goiânia Goiás Brazil
3. Institute of Mathematics and Computer Science University of São Paulo São Carlos São Paulo Brazil
4. Department of Epidemiology and Statistics A.C.Camargo Cancer Center São Paulo São Paulo Brazil
5. Samuel Oschin Comprehensive Cancer Institute Cedars‐Sinai Medical Center Los Angeles CA USA