[1] Univ Hosp Augsburg, Dept Pediat Surg, Augsburg, Germany
[2] Univ Hosp Wurzburg, Dept Gen Visceral Transplant Vasc & Pediat Surg, Oberdurrbacher Str 6, D-97080 Wurzburg, Germany
[3] Univ Augsburg, Med Fac, Med Didact & Educ Res, DEMEDA, Augsburg, Germany
[4] Univ Hosp Augsburg, Dept Hyg & Environm Med, Augsburg, Germany
[5] Uniklinikum Wurzburg, Klin & Poliklin Allgemein Viszeral Transplantat Ge, Oberdurrbacher Str 6, D-97080 Wurzburg, Germany