[1] HUMBOLDT UNIV BERLIN, FAK MED, VIRCHOW KLINIKUM, DEPT SURG, D-1040 BERLIN, GERMANY
[2] HUMBOLDT UNIV BERLIN, FAK MED, VIRCHOW KLINIKUM, DEPT INTERNAL MED, D-1040 BERLIN, GERMANY
[3] HUMBOLDT UNIV BERLIN, FAK MED, VIRCHOW KLINIKUM, DEPT PATHOL, D-1040 BERLIN, GERMANY