1 From the Section of Cardiology, Department of Molecular Medicine, University of Pavia (EB), Cardiac Intensive Care Unit, Arrhythmia and Electrophysiology and Experimental Cardiology, Fondazione IRCCS Policlinico San Matteo (EB), Division of Cardiology, Fondazione IRCCS Policlinico San Matteo (SS), AREU Azienda Regionale Emergenza Urgenza - AAT Pavia C/O Fondazione IRCCS Policlinico San Matteo, Pavia, Italy (EC), Emergency Department, Calderdale Royal Hospital, Halifax (AL), School of Nursing, Midwifery & Social Work, The University of Manchester, Manchester (PC), Resuscitation for Medical Disciplines, University of Birmingham & Sandwell and West Birmingham NHS Trust, Birmingham, UK (JH), Department of Emergency Medicine, 'Grigore T. Popa' University of Medicine and Pharmacy, Iasi, Romania (DC), Paediatric Emergency Department, Imperial College Healthcare NHS Trust, London, UK (IM), Department of Anaesthesiology and Intensive Care Medicine, University Hospital of Cologne, Köln, Germany (BWB), Department of Anaesthesiology and Pain Medicine, Bern University Hospital, Bern, Switzerland (RG) and School of Medicine, Sigmund Freud University Vienna, Vienna, Austria (RG).