1 Intensive Cardiac Care Unit, Cardiology Department, Konstantopouleio General Hospital, Athens, Greece; European Resuscitation Council, Niel, Belgium.
2 Department of Anaesthesia, Intensive Care and Prehospital Emergency, Maggiore Hospital Carlo Alberto Pizzardi, Bologna, Italy; European Resuscitation Council, Niel, Belgium. Electronic address: federico.semeraro@erc.edu.
3 European Resuscitation Council, Niel, Belgium.
4 European Resuscitation Council, Niel, Belgium; Department of Emergency Medicine, Antwerp University Hospital and University of Antwerp, Belgium.