1. Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
2. Department of Oncology, Barretos Cancer Hospital, Jales, São Paulo, Brazil
3. Nucleus of Epidemiology and Biostatistics, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
4. Department of Endoscopy, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
5. Life and Health sciences Research Institute, University of Minho, Gualtar Campus, Braga, Portugal
6. ICVS/3B’s-PT Government Associate Laboratory, Gualtar Campus, Braga, Portugal