[1] Warwick Med Sch, Coventry, W Midlands, England
[2] Starship Childrens Hosp, Auckland, New Zealand
[3] Beth Israel Deaconess Med Ctr, Boston, MA 02215 USA
[4] McGill Univ, Montreal, PQ, Canada
[5] Univ Michigan, Ann Arbor, MI 48109 USA
[6] Helsinki Univ Hosp, Helsinki, Finland
[7] Univ Alberta, Edmonton, AB, Canada
[8] Univ Peruana Ciencias Aplicadas, Lima, Peru
[9] Bern Univ Hosp, Bern, Switzerland
[10] Vanderbilt Univ, 221 Kirkland Hall, Nashville, TN 37235 USA
[11] Resuscitat Council Southern Africa, Randburg, South Africa
[12] Imperial Coll Healthcare Trust, London, England
[13] Univ Texas Arlington, Arlington, TX 76019 USA
[14] Univ Penn, Philadelphia, PA 19104 USA
[15] Straub Clin & Hosp, Honolulu, HI USA
[16] Univ Melbourne, Royal Melbourne Hosp, Melbourne, Vic, Australia
[17] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[18] Oslo Univ Hosp, Oslo, Norway
[19] Univ Hosp NHS Fdn Trust, Birmingham, W Midlands, England
[20] Univ Virginia, Charlottesville, VA 22903 USA
[21] Southmead Hosp North Bristol NHS Trust, Bristol, Avon, England
[22] Chang Bing Show Chwang Mem Hosp, Lukang Township, Changhua County, Taiwan
[23] UT Southwestern, Dallas, TX USA
[24] James Cook Univ Hosp, Middlesbrough, Cleveland, England
[25] Thames Valley Air Ambulance Med Directorate, Stokenchurch, High Wycombe, England