[1] Univ Nottingham, Nottingham Digest Dis NIHR Biomed Res Unit, Div Gastrointestinal Surg, Nottingham NG7 2RD, England
[2] Mercy Med Ctr, Des Moines, IA 50314 USA
[3] Baptist St Anthony Hosp Syst, Amarillo, TX 79109 USA
[4] St Peters Hlth Partners, Albany, NY 12208 USA
[5] Univ Pittsburgh, Dept Radiol, Pittsburgh, PA 15213 USA
[6] Med Coll Wisconsin, Div Surg Oncol, Dept Surg, Milwaukee, WI 53226 USA