1. St. Paul's Hospital; Vancouver Canada
2. Escola Paulista de Medicina - UNIFESP; São Paulo Brazil
3. Segeberger Kliniken; Bad Segeberg Germany
4. Stanford University School of Medicine; Stanford California
5. Royal Brompton Hospital; London United Kingdom
6. Clinique Pasteur; Toulouse France
7. Ferrarotto Hospital; Catania Italy
8. Azienda Ospedaliero-Universitaria Pisana; Pisa Italy
9. University Hospital Zürich; Zürich, Switzerland
10. Centro Hospitalar Vila Nova de Gaia; Vila Nova de Gaia Portugal
11. Third Faculty of Medicine - Charles University; Prague Czech Republic
12. University of Washington; Seattle Washington
13. Sunnybrook Hospital; Toronto Canada
14. Sunninghill Hospital; Johannesburg Republic of South Africa
15. Odense University Hospital; Odense Denmark
16. University Hospital Heidelberg; Heidelberg Germany
17. Mayo Clinic; Rochester Minnesota
18. The Alfred Hospital; Melbourne Australia