[1] Tech Univ Munich, Klinikum Rechts Isar, Inst Pathol & Patholog Anat, D-81675 Munich, Germany
[2] Univ Spital Zurich, Dept Pathol, Inst Klin Pathol, Zurich, Switzerland
[3] Stadtspital Triemli, Inst Pathol, Zurich, Switzerland
[4] Univ Med Berlin, Charite, Med Klin Schwerpunkt Hepatol & Gastroenterol, Berlin, Germany