[1] Johns Hopkins Med Inst, Baltimore, MD 21205 USA
[2] Univ Leuven, Univ Hosp Gastuisberg, Dept Hepatol, Div Liver & Pancreat Biliary Disorders, Leuven, Belgium
[3] Aarhus Univ Hosp, DK-8000 Aarhus, Denmark
[4] Chinese Univ Hong Kong, Prince Wales Hosp, Dept Surg, Hong Kong, Hong Kong, Peoples R China
[5] Univ Sao Paulo, Dept Surg, Sao Paulo, Brazil
[6] AUSL Bologna Bellaria Maggiore Hosp, Unit Gastroenterol & Digest Endoscopy, Bologna, Italy
[7] Mediterranean Inst Transplantat & Adv Specialized, Dept Diagnost & Therapeut Serv, Endoscopy Serv, Palermo, Italy
[8] Florida Hosp, Ctr Intervent Endoscopy, Orlando, FL USA
[9] Winthrop Univ Hosp, Mineola, NY 11501 USA
[10] Hosp Univ Rio Hortega, Valladolid, Spain
[11] Med Univ S Carolina, Div Gastroenterol & Hepatol, Charleston, SC 29425 USA
[12] Univ Colorado, Div Gastroenterol & Hepatol, Anschutz Med Campus, Aurora, CO USA