1. Emergency Department, European Georges Pompidou Hospital, Paris, France (R.C., P.J.).
2. Sudden Death Expertise Centre, INSERM U970, Paris, France (R.C., L.L., D.J., W.B., F.B., E.M., X.J., A.C., F.D.).
3. Paris Descartes University, France (R.C., L.L., P.J., E.M., X.J., A.C., F.D.).
4. Emergency Medical Services, SAMU 92, Raymond Poincaré Hospital, Garches, Hauts-de-Seine, France (T.L.).
5. Emergency Medical Services, SAMU 75, Necker Hospital, Paris, France (L.L.).
6. Brigade des Sapeurs Pompiers de Paris, France (D.J.).
7. Emergency Medical Services, SAMU 93, Avicenne Hospital, Avicenne, Seine-Saint-Denis, France (F.A.).
8. Emergency Medical Services, SAMU 94, Henri Mondor Hospital, Créteil, Val-de-Marne, France (E.L.).
9. Cardiology Department, European Georges Pompidou Hospital, Paris, France (E.M., X.J.).
10. Medical Intensive Care Unit, Cochin Hospital, Paris, France (A.C.).
11. Emergency Department, Cochin/Hotel Dieu Hospital, Paris, France (F.D.).