Mayo Clinic, Rochester, Minnesota, United States
Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (there may be other sites in this country), Sao Paulo, Brazil
Gastro-Entérologie et Hépatologie - CHU Brabois (there may be other sites in this country), Vandoeuvre-les-Nancy, France
Charité - Universitätsmedizin Berlin (there may be other sites in this country), Berlin, Germany
The 6th hospital affiliated to Zhongshan University (there may be other sites in this country), Guangzhou, China
Investigational site (there may be other sites in this country), Tokyo, Japan
Gelre Ziekenhuizen (there may be other sites in this country), Zutphen, Netherlands
Isala Klinieken (there may be other sites in this country), Zwolle, Netherlands
Gastroenterologie am Bayerischen Platz (there may be other sites in this country), Berlin, Germany
Ed Herriot Hopital (there may be other sites in this country), Lyon, France
Medisch Centrum Alkmaar (there may be other sites in this country), Alkmaar, Netherlands
Investigational site (there may be other sites in this country), Rottweil, Germany