1. Division of Cardiology, Toronto General Hospital, Toronto, ON, Canada M5G 2C4
2. Department of Cardiology, Papworth Hospital NHS Foundation Trust, Papworth Everard, Cambridge CB23 3RE, UK
3. Department of Cardiology, Baruch Padeh Medical Center, Poriya and Bar-Ilan University, 15208 Tiberias, Israel
4. Department of Medical Imaging, Toronto General Hospital, Toronto, ON, Canada M5G 2C4
5. Department of Cardiac Surgery, Toronto General Hospital, Toronto, ON, Canada M5G 2C4
6. Division of Cardiology, University Hospital Zurich, 8091 Zurich, Switzerland
7. Hypertrophic Cardiomyopathy Center, Minneapolis Heart Institute Foundation, Minneapolis, MN 55407, USA
8. Hypertrophic Cardiomyopathy Center, Tufts Medical Center, Boston, MA 02111, USA