Aprotinin improves early graft survival but does not reduce the activation of matrix metalloproteinases in orthotopic liver transplantation: I Q Molenaar, Dept of Surgery, Leiden University Medical Center, Leiden Netherlands; Johan P Kuyvenhoven, Dept of Hepatology, Leiden University Medical Center, Leiden Netherlands; Gerardo Palareti, Dept of Angiology, S Orsola University Hospital, Bologna Italy; Onno Terpstra, Dept of Surgery, Leiden University Medical Center, Leiden Netherlands; Bart Van Hoek, Hein Verspaget, Dept of Hepatology, Leiden University Medical Center, Leiden Netherlands; Robert J Porte, Dept of Surgery, University Hospital Groningen, Groningen Netherlands