1. a Department of Surgical Sciences, Crafoord Laboratory, Karolinska Hospital, SE-171 76 Stockholm, Sweden
2. b Department of Surgical Sciences, Crafoord Laboratory, Karolinska Hospital, SE-171 76 Stockholm, Sweden
3. c Department of Immunology and Transfusion Medicine, Nordland Central Hospital and University of Tromsø, N-8017 Bodø, Norway
4. d Carmeda AB, Björnnäsvägen 21, SE-113 47 Stockholm, Sweden