5 Division of Cardiology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
6 Fire Department & Emergency Medical Service, City of Aachen, Aachen, Germany.
7 Aachen Institute for Rescue Management & Public Safety, University Hospital RWTH Aachen University & City of Aachen, Aachen, Germany.
8 Swiss Resuscitation Council, Bern, Switzerland.
9 Interverband für Rettungswesen, Aarau, Switzerland.
10 Karolinska Institutet, Stockholm, Sweden.
11 Heartrunner Citizen Responder System, Heartrunner Sweden AB, Solna, Sweden.
12 Department of Anaesthesiology and Intensive Care Medicine, Faculty of Medicine, University Hospital of Freiburg, University of Freiburg, Freiburg, Germany.
13 Emergency Medical Service Vienna, Vienna, Austria.