Out-of-hospital cardiac arrest in children: an epidemiological study based on the German Resuscitation Registry identifying modifiable factors for return of spontaneous circulation oleh Stephan Katzenschlager, Inga K. Kelpanides, Patrick Ristau, Matthias Huck, Stephan Seewald, Sebastian Brenner, Florian Hoffmann, Jan Wnent, Jo Kramer-Johansen, Ingvild B. M. Tjelmeland, Markus A. Weigand, Jan-Thorsten Gräsner, Erik Popp