1. Baylor Heart and Vascular Institute, Baylor University Medical Center, Dallas, TX (M.P.).
2. Imperial College, London, UK (M.P.).
3. National Heart Centre Singapore and Duke-National University of Singapore (C.S.P.L).
4. University Medical Centre Groningen, The Netherlands (L.H.L).
5. The George Institute for Global Health, Australia (L.H.L).
6. Department of Medicine, Karolinska Institutet and Heart and Vascular Theme, Karolinska University Hospital, Sweden (L.H.L).
7. Mayo Clinic, Rochester, MN (M.M.R.).