[1] Sana Hosp Lichtenberg, Med Dept 1, Gastroenterol, Berlin, Germany
[2] Dept Allgemeine Innere Med Kliniken DAIM Hirslande, Bern, Switzerland
[3] Krankenhaus Mark Oderland, Dept Internal Med, Strausberg, Germany
[4] Med Univ Brandenburg, Brandenburg Inst Clin Ultrasound BICUS, Neuruppin, Germany
[5] UT MD Anderson Canc Ctr, Dept Gastroenterol Hepatol & Nutr, Houston, TX USA
[6] Leeds Teaching Hosp NHS Trust, Dept Gastroenterol, Leeds, England
[7] Oxford Univ Hosp, Translat Gastroenterol Unit, Oxford, England
[8] Helios Klinikum Meiningen, Med Dept, Meiningen, Germany
[9] Royal Infirm Edinburgh NHS Trust, Edinburgh, Scotland
[10] Shanghai Jiao Tong Univ, Sch Med, Dept Ultrasound, Xinhua Hosp, Shanghai, Peoples R China
[11] Carol Davila Univ Med, Colentina Clin Hosp, Dept Gastroenterol, Clin Internal Med, Bucharest, Romania
[12] China Med Univ, Shengjing Hosp, Dept Endoscopy Ctr, Shenyang, Liaoning, Peoples R China
[13] Tech Univ Dresden, Univ Klinikum Dresden, Childrens Hosp, Dresden, Germany
[14] Inselspital Bern, Univ Hosp, Bern, Switzerland
[15] Sana Kliniken Luebeck, Med Klin 1, Lubeck, Germany