Abstract
1 Laboratory of Gastroenterology and Hepatology, São Paulo Institute of Tropical Medicine and Department of Gastroenterology, School of Medicine, University of São Paulo, Brazil
2 Laboratory of Virology, São Paulo Institute of Tropical Medicine, Department of Infectious and Parasitic Diseases, School of Medicine, University of São Paulo, Brazil
3 Laboratory of Virology, Department of Microbiology, Pontificia Javeriana University Bogotá, Colombia