[1] Jikei Univ, Sch Med, Dept Endoscopy, 3 Chome 25-8 Nishi Shinbashi, Minato City, Tokyo 1058461, Japan
[2] Yale Sch Med, Dept Med, Sect Digest Dis, 333 Cedar St, New Haven, CT 06510 USA
[3] Mediterraneo Hosp, Dept Gastroenterol, Div Hybrid Intervent Endoscopy, 8-12 Ilias St Glyfada, Athens 16675, Greece
[4] Columbia Univ, Irving Med Ctr, Dept Med, Div Digest & Liver Dis, 630 West 168th St, New York, NY 10032 USA
[5] St Cloud Hosp, CentraCare, Intervent Endoscopy Program, 1406 6th Ave North, St Cloud, MN 56303 USA