1. St George’s Hospital, London, UK
2. Helsinki University Hospital, Helsinki, Finland
3. Aarhus University Hospital (Aalborg), Aalborg, Denmark
4. University of Zagreb, Zagreb, Croatia
5. Innsbruck Medical University, Innsbruck, Austria
6. Kliniken Ludwigsburg-Bietigheim, Germany
7. University Hospital Maastricht, Maastricht, the Netherlands
8. Oulu University Hospital, Oulu, Finland