1 School of Medicine, Vanderbilt University, Nashville, USA.
2 Department of Gastroenterology, Hospital Privado Universitario de Córdoba, Instituto Universitario de Ciencias Biomédicas de Córdoba, Córdoba, Argentina.
3 Centro de Enfermedades Hepaticas y Digestivas (CEHYD), Bogota, Colombia.
4 Department of Gastroenterology, Hospital Clinicas, Buenos Aires, Argentina.
5 Departament of Gastroenterology and Hepatology, Hospital Eugenio Espejo, Quito, Ecuador.
6 Consejo Nacional de Investigaciones Científicas y Técnicas, Posadas, Argentina.
7 Department of Gastroenterology, Hospital Nacional Edgardo Rebagliati Martins (HNERM), Lima, Peru.
8 Department of Medicine, University of Minnesota, Minneapolis, Minnesota, USA.
9 Federal University of Health Sciences of Porto Alegre, Porto Alegre, Brazil.
10 Department of Gastroenterology, School of Medicine, University of São Paulo, São Paulo, Brazil.