[1] Univ Antwerp, Fac Med & Hlth Sci, Emergency Med, B-2020 Antwerp, Belgium
[2] Univ Ghent, Fac Med & Hlth Sci, Ghent, Belgium
[3] Royal United Hosp, Anaesthesia & Intens Care Med, Bath BA1 3NG, Avon, England
[4] Univ Bristol, Bristol, Avon, England
[5] Univ Antwerp, B-2020 Antwerp, Belgium
[6] Univ Hosp Bern, Dept Anaesthesiol & Pain Med, CH-3010 Bern, Switzerland
[7] Univ Bern, Bern, Switzerland
[8] Univ London Imperial Coll Sci Technol & Med, Imperial Coll Healthcare NHS Trust, Paediat Emergency Med Dept, London, England
[9] Univ London Imperial Coll Sci Technol & Med, BRC Imperial NIHR, London, England
[10] Konstantopouleio Gen Hosp, Dept Cardiol, Athens, Greece
[11] Univ Warwick, Warwick Med Sch, Coventry CV4 7AL, W Midlands, England
[12] Southmead Hosp, Anaesthesia & Intens Care Med, Bristol, Avon, England
[13] Univ Hosp, Emergency Med Serv Hradec Kralove Reg, Hradec Kralove, Czech Republic
[14] Univ Hosp, Dept Anesthesiol & Intens Care Med, Hradec Kralove, Czech Republic
[15] James Cook Univ Hosp, Dept Neonatol, Middlesbrough, Cleveland, England
[16] Imperial Coll Healthcare NHS Trust, London, England