1. Pasteur Institute; Department of Microbiology; Helicobacter Pathogenesis Unit; Paris Cedex 15 France
2. INSERM U1173; Faculty of Health Sciences Simone Veil; Université Versailles-Saint-Quentin; Saint Quentin en Yvelines France
3. Graduate School of Medicine and Pharmaceutical Sciences; Department of Gastroenterology; University of Toyama; Sugitani Toyama Japan