1. University of Alberta and Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada (M.M.G.)
2. Cleveland Clinic, Cleveland, Ohio (D.I.S.)
3. Queen's University, Kingston, Ontario, Canada (J.L.P.)
4. Groote Schuur Hospital and University of Cape Town, Western Cape, South Africa (B.M.B.)
5. Hamilton Health Sciences and McMaster University, Hamilton, Ontario, Canada (G.G., D.J.C., V.T., A.L., R.W., Y.L., P.G., S.Y., P.D.)
6. Royal Melbourne Hospital, Melbourne Medical School, University of Melbourne, and Monash University, Melbourne, Victoria, Australia (K.L.)
7. The Chinese University of Hong Kong, Hong Kong, China (M.T.C.)
8. Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark (C.S.M.)
9. St. John's Medical College and Research Institute, Bangalore, India (D.X.)
10. Narayana Hrudayalaya, Bangalore, India (A.S.)
11. University of North Carolina, Chapel Hill, North Carolina (P.A.K.)
12. Schulich School of Medicine & Dentistry at Western University, London, Ontario, Canada (M.M.)
13. Sant Pau Hospital and Biomedical Research Institute, Autonomous University of Barcelona, Research Center of Cardiovascular Diseases (CIBERCV), Barcelona, Spain (J.A.)
14. Fundación Cardioinfantil Instituto de Cardiología, Bogotá, Colombia, and Department of Medicine, Universidad Autónoma de Bucaramanga, Santander, Colombia (J.C.V.)
15. University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia (T.W.P.)
16. IRCCS San Raffaele Scientific Institute and Vita-Salute San Raffaele University, Milan, Italy (G.L.)
17. Medical University of Vienna, Vienna, Austria (E.F.)
18. Hospital Arzobispo Loayza, Universidad Peruana Cayetano Heredia, Lima, Peru (M.A.)
19. The University of Texas MD Anderson Cancer Center, Houston, Texas (J.P.C.)
20. Royal Hobart Hospital and University of Tasmania, Hobart, Tasmania, Australia (N.C.T.)
21. CARE Hospitals, Maharanipeta, Visakhapatnam, India (P.V.R.)
22. Auckland City Hospital, Auckland, New Zealand (K.A.J.)
23. McGill University Health Centre, Montréal, Québec, Canada (A.B.)
24. Hospital Italiano de Buenos Aires, Buenos Aires, Argentina (G.R.M.)
25. Hospital Universitario Fundación Hospital Alcorcon, Madrid, Spain (S.R.)
26. Centre Hospitalier Universitaire de Hautepierre, Strasbourg, France (P.A.D.)