1. From the Radiation Oncology Department, Hospital A.C. Camargo (ACAP, JVS, MACM, RF, PERSN, RCF), Radiotherapy Department, Instituto do Cancer Arnaldo Vieira de Carvalho (ACAP, RCF) and Radiology Department, Faculdade de Medicina de Catanduva (RJAP), Sao Paulo, Brazil