[1] Department of Surgery,
[2] University Hospital Nijmegen St. Radboud,undefined
[3] P. O. Box 9101,undefined
[4] 6500 HB Nijmegen,undefined
[5] The Netherlands,undefined
[6] Biochemical and Experimental Division,undefined
[7] II Department of Surgery,undefined
[8] University of Cologne,undefined
[9] Germany,undefined