Affiliation: | Paula RS Câmara, Fernando AB Suassuna, Department of Medicine, Potiguar University, RN 59056-000, BrazilPaula RS Câmara, Gerson JN Ferraz, Licio A Velloso, José Murilo R Zeitune, Jose Geraldo P Ferraz, GI Research Lab, Gastrocentro, Department of Medicine, Faculty of Medical Sciences, University of Campinas, SP 13083-878, BrazilJose Geraldo P Ferraz, Division of Gastroenterology, Faculty of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada |