1. INSERM U1053; University of Bordeaux; Bordeaux France
2. National Reference Center for Helicobacters; Bacteriology laboratory; CHU de Bordeaux; France
3. Alfa Institute of Gastroenterology; Clinics Hospital, Federal University of Minas Gerais; Belo Horizonte Brazil
4. Faculty of Medicine of the Federal University of Minas Gerais; Belo Horizonte Brazil