Lay-rescuer-CPR and telephone-assisted-CPR shorten the resuscitation-free interval and thus improve long-time survival. An analysis of the German resuscitation registry. (September 2017) - Bohn, Andreas; Lang, Sabrina; Wnent, Jan; Seewald, Stephan; Brenner, Sigrid; Jantzen, Tanja; Gräsner, Jan-Thorsten; Fischer, Matthias