[1] Emergency Med Serv Hradec Kralove Reg, Hradec Kralove, Czech Republic
[2] Univ Hosp Hradec Kralove, Dept Anaesthesiol & Intens Care Med, Hradec Kralove, Czech Republic
[3] Southampton Univ Hosp NHS Trust, NIHR Southampton Resp Biomed Res Unit, Cardiac Anaesthesia & Cardiac Intens Care, Southampton, Hants, England
[4] North Bristol NHS Trust, Southmead Hosp, Anaesthesia & Intens Care Med, Bristol, Avon, England
[5] Six October Univ Hosp, Emergency & Disaster Med, Cairo, Egypt
[6] Victoria Hosp, Dept Renal, Kirkcaldy, Fife, Scotland
[7] Victoria Hosp, Dept Internal Med, Kirkcaldy, Fife, Scotland
[8] Soc Rescue People Drowning, Amsterdam, Netherlands
[9] Haukeland Hosp, Dept Anaesthesia & Intens Care, Bergen Emergency Med Serv, N-5021 Bergen, Norway
[10] EURAC Inst Mt Emergency Med, Bolzano, Italy
[11] James Cook Univ Hosp, Dept Cardiothorac Surg, Middlesbrough, Cleveland, England
[12] Clin Hosp Ctr Zagreb, Ctr Emergency Med, Zagreb, Croatia
[13] Univ Amsterdam, Acad Med Ctr, Dept Cardiol, NL-1105 AZ Amsterdam, Netherlands
[14] North Bristol NHS Trust, Southmead Hosp, Intens Care Med & Anaesthesia, Bristol, Avon, England
[15] Johannes Gutenberg Univ Mainz, Univ Med Ctr, Dept Anesthesiol, D-55122 Mainz, Germany
[16] Queen Mary Univ London, Barts Hlth NHS Trust, St Bartholomews Hosp, Barts Heart Ctr, London, England
[17] Univ Innsbruck Hosp, Dept Anaesthesiol & Crit Care Med, Innsbruck, Austria
[18] Univ Warwick, Warwick Med Sch, Coventry CV4 7AL, W Midlands, England
[19] Heart England NHS Fdn Trust, Crit Care Unit, Birmingham, W Midlands, England
[20] Univ Cattolica Sacro Cuore, Sch Med, Dept Anaesthesiol & Intens Care, I-00168 Rome, Italy
[21] Birmingham Childrens Hosp, Birmingham, W Midlands, England
[22] Imperial Coll Healthcare NHS Trust, Dept Anaesthet, London, England
[23] Royal United Hosp, Anaesthesia & Intens Care Med, Bath BA1 3NG, Avon, England
[24] Univ Bristol, Sch Clin Sci, Bristol BS8 1TH, Avon, England