1. French National Out-of-Hospital Cardiac Arrest Registry (RéAC); Lille France
2. Public Health Department (EA 2694); Lille University; Lille France
3. Department of Research and Evaluation, Ambulance Victoria, Doncaster, and Department of Epidemiology and Preventive Medicine; Monash University; Prahran Victoria Australia
4. Saint-Pierre University Hospital; Université Libre de Bruxelles; Bruxelles Belgium
5. Centre Sud-Francilien Hospital; Corbeil Essonnes France
6. Department of Emergency Medicine; SAMU 77; Melun France
7. Department of Emergency Medicine; SAMU du Nord and Emergency Department for Adults; Lille France
8. AP-HP, Department of Emergency Medicine; Hôpital Avicenne; Inserm U942, Paris 13 University Bobigny France