1. European Georges Pompidou Hospital, Cardiology Department, Paris, France (V.W., N.K., A.S., E.M., X.J.).
2. Sudden Death Expertise Center, INSERM U970, Paris Cardiovascular Research Center (PARCC), European Georges Pompidou Hospital, Paris, France (V.W., N.K., B.G., W.B., F.D., A.S., K.N., H.K., F.B., A.C., E.M., X.J.).
3. Paris University, France (V.W., N.K., B.G., W.B., F.D., A.S., B.L., A.C., E.M., X.J.).
4. Ramsay Générale de Santé, Hôpital privé Jacques Cartier, Intensive Care Unit, Massy, France (W.B.).
5. Emergency Department, Cochin Hospital, Paris, France (F.D.).
6. Cardiology Department, Medicover Hospitals, Hyderabad, India (K.N.).
7. Paris Firefighters Brigade, France (D.J.).
8. SAMU de Paris, Necker Hospital, France (L.L., P.J.).
9. SAMU 92, Garches, France (T.L.).
10. SAMU 93, Bobigny, France (F.A., J.-M.A.).
11. Cerebrovascular Unit, La Pitié Salpêtrière Hospital, Paris, France (S.D.).
12. SAMU 94, Créteil, France (F.R.).
13. Intensive Care Unit, Lariboisière Hospital, Paris, France (S.V., B.M.).
14. Intensive Care Unit, Cochin Hospital, Paris, France (A.C.).