[1] Univ Hosp Zurich, Dept Surg & Transplantat, Swiss HPB Ctr, Ramistr 100, CH-8091 Zurich, Switzerland
[2] Univ Hosp Zurich, Inst Diagnost & Intervent Radiol, Zurich, Switzerland
[3] Univ Zurich, Zurich, Switzerland
[4] UHasselt, Jessa Ziekenhuis, Dept Abdominal Surg, Hasselt, Belgium
[5] UHasselt, Fac Med & Hlth Sci, Dept Morphol, Hasselt, Belgium
[6] Canton Zurich, Cantonal Hosp Winterthur, Dept Surg, Zurich, Switzerland
[7] Rush Univ, Med Ctr, Dept Surg, Chicago, IL 60612 USA