Affiliation: | (1) Institute for Surgical Research, Rikshospitalet, The National Hospital, Pilestredet 32, N-0027 Oslo, Norway Fax: + 47 22 111 987, NO;(2) Surgical Department B, Rikshospitalet, The National Hospital, Pilestredet 32, N-0027 Oslo, Norway, NO;(3) Department of Anesthesiology, Rikshospitalet, The National Hospital, Pilestredet 32, N-0027 Oslo, Norway, NO;(4) Surgical Department A, Rikshospitalet, The National Hospital, Pilestredet 32, N-0027 Oslo, Norway, NO |