[1] Univ Nottingham, Gastrointestinal Surg, Nottingham Digest Dis Ctr, NIHR,Nottingham Biomed Res Unit, Nottingham, England
[2] Nottingham Univ Hosp, Nottingham, England
[3] Univ Def, Dept Mil Internal Med & Mil Hyg, Fac Mil Hlth Sci, Hradec Kralove, Czech Republic
[4] Klinikum St Georg gGmbH, Klin Allgemein Viszeral & Onkol Chirurg, Delitzscher Str 141, D-04129 Leipzig, Germany