1. Cardiac Surgery Division Saint Michael's Hospital Toronto Ontario Canada
2. Cardiology Division, Le Scotte Hospital University of Siena Viale Bracci Siena Italy
3. North York Ontario Canada
4. Cardiac Surgery Division The Aga Khan University Karachi Pakistan Pakistan
5. CARIM Maastricht University Medical Center Maastricht The Netherlands
6. Cardiac Surgery Division, Kingston General Hospital Queen University Kingston Ontario Canada
7. FU of Cardiac Surgery, Experimental and Clinical Medicine Department University of Florence Firenze Italy