1. KU Leuven, Leuven, Belgium.
2. AZ Maria-Middelares Hospital, Gent, Belgium.
3. University of Athens, Athens, Greece.
4. Royal College of Surgeons, Dublin, Ireland.
5. Bispebjerg University Hospital, Copenhagen, Denmark.
6. Aristotle University, Thessaloniki, Greece.
7. Wellness International Medical Centre, Stockport, UK.
8. Cardiovascular Prevention Centre, Udine, Italy.
9. Sahlgrenska University Hospital/Ostra, Goteborg, Sweden.
10. York St John University, York, UK.