Authors: Paulo Emilio Botura Ferreira; Cláudia Regina Pinheiro Lopes; Angela Maria Pereira Alves; Éder Paulo Belato Alves; David Robert Linden; Jacqueline Nelisis Zanoni; Nilza Cristina Buttow Journal: World J Gastroenterol Date: 2013-10-14 Impact factor: 5.742