[1] Univ Basel, Fac Med, Dept Biomed Engn, Allschwil, Switzerland
[2] Univ Ctr Gastrointestinal & Liver Dis, Clarunis, Dept Visceral Surgery, Basel, Switzerland
[3] Univ Erlangen Nurnberg, Fac Med, Erlangen, Germany
[4] Univ Nevada, Dept Surg, Las Vegas, NV USA
[5] East Carolina Univ, Dept Surg, Brody Sch Med, Greenville, NC USA
[6] Univ Basel, Fac Med, Dept Biomed Engn, Hegenheimermattweg 167c, CH-4123 Allschwil, Switzerland