[1]Caritas Krankenhaus, Dept Internal Med 2, Bad Mergentheim, Germany;
[2]Zhengzhou Univ, Affiliated Hosp 1, Dept Ultrasound, Zhengzhou, Henan, Peoples R China;
[3]Beth Israel Deaconess Med Ctr, Harvard Med Sch, Dept Emergency Med, Boston, MA 02215 USA;
[4]Univ Chicago, Dept Obstet & Gynecol, Ultrasound Serv, Chicago, IL 60637 USA;
[5]Iuliu Hatieganu Univ Med & Pharm, Sch Med, Imaging Desk & Ultrasound Dept, Cluj Napoca, Romania;
[6]Octavian Fodor Inst Gastroenterol & Hepatol, Cluj Napoca, Romania;
[7]John Radcliffe Hosp, Translat Gastroenterol Unit, Oxford, England;
[8]Univ Sapienza, Policlin Umberto 1, Dept Diagnost Imaging, Rome, Italy;
[9]Univ Sao Paulo, Hosp Clin, Sch Med, Dept Radiol, Sao Paulo, Brazil;
[10]Huazhong Univ Sci & Technol, Tongji Hosp, Tongji Med Coll, Dept Med Ultrasound, Wuhan, Hubei, Peoples R China;
[11]Fudan Univ, Zhongshan Hosp, Dept Ultrasound, Shanghai, Peoples R China;
[12]Univ Bergen, Haukeland Univ Hosp, Natl Ctr Ultrasound Gastroenterol, Bergen, Norway;
[13]Univ Bergen, Dept Clin Med, Bergen, Norway;
[14]Univ Bern, Berner Inst Hausarztmed BIHAM, Bern, Switzerland;
[15]Penn Presbyterian Med Ctr, Dept Med Imaging, Philadelphia, PA USA;
[16]Flinders Univ S Australia, Coll Nursing & Hlth Sci, Adelaide, SA, Australia;
[17]Sydney Ultrasound Women, Sydney, NSW, Australia;
[18]Univ Copenhagen, Copenhagen Acad Med Educ & Simulat, Herlev Hosp, Dept Gastroenterol,Div Surg,Ultrasound Sect, Copenhagen, Denmark;
[19]Brandenburg Med Sch Theodor Fontane, Dept Internal Med & Gastroenterol, Neuruppin, Germany;
[20]Med Univ Vienna, Vienna Gen Hosp, Dept Biomed Imaging & Image Guided Therapy, Vienna, Austria;
[21]Riga Stradins Univ, Univ Latvia, Paula Stradins Clin Univ Hosp, Diagnost Radiol Inst, Riga, Latvia;
[22]Univ Hosp Bonn, Dept Obstet & Gynecol, Bonn, Germany;
[23]Univ Hosp Bonn, Sono Educ Acad, Bonn, Germany;
[24]Med Univ Vienna, Dept Biomed Imaging & Image Guided Therapy, Vienna, Austria;
[25]Res Ctr Gastroenterol & Hepatol, Dept Gastroenterol, Craiova, Romania;
[26]Klin Hirslanden, EFSUMB Learning Ctr, Dept Internal Med & Nephrol, Zurich, Switzerland;
[27]Aga Khan Univ Hosp, WFUMB COE, Dept Imaging & Diagnost Radiol, Nairobi, Kenya;
[28]Charles Sturt Univ, Ultrasound, Bathurst, NSW, Australia;
[29]Yuanpei Univ Med Technol, Natl Yang Ming Univ, Taipei Vet Gen Hosp, Dept Radiol, Taipei, Taiwan;
[30]Yuanpei Univ Med Technol, Natl Yang Ming Univ, Sch Med, Taipei, Taiwan;
[31]Univ South Carolina, St Francis Hosp, Sch Med, Dept Emergency Med, Columbus, GA USA