1. Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
2. Department of Digestive Surgery, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
3. Department of Pathology & Molecular Diagnostics, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
4. Department of Digestive Surgery & Pathology, Medical School, UFTM -Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
5. Department of Gastroenterology Surgery & Pathology, Medical School, UNESP - São Paulo State University, Botucatu, São Paulo, Brazil
6. Department of Endoscopy, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
7. Life & Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
8. ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal