1. School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil
2. Medicine Course, Institute of Exact and Natural Sciences (ICEN), Federal University of Rondonópolis (UFR), Rondonópolis, Brazil
3. Division of Gastroenterology (Gastrocentro), School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil
4. Division of Clinical Gastroenterology and Hepatology, Department of Gastroenterology, University of São Paulo School of Medicine (FMUSP), Sao Paulo, Brazil