1 Endoscopy Unit, Gastroenterology Department, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.
2 Division of Gastroenterology and Hepatology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
3 Gastroenterology Department, Hospital São Bernardo, Centro Hospitalar de Setúbal, Setúbal, Portugal.
4 Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
5 Division of Gastroenterology and Hepatology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. Electronic address: vkumbhari@gmail.com.