1. Malmö General Hospital, Malmö, Sweden
2. Royal Infirmary, Glasgow, UK
3. Haukeland Hospital, Bergen, Norway
4. Institut für Experimentelle Chirurgie, Munich, Germany
5. McMaster University, Hamilton, Ontario, Canada
6. Aalborg Hospital, Aalborg, Denmark
7. Hôtel Dieu, Paris, France
8. UZ Gasthulsberg, Leuven, Belgium