[1] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[2] Resuscitat Outcome Consortium, Seattle, WA 98105 USA
[3] Univ Iowa, Carver Coll Med, Stead Family Dept Pediat, Iowa City, IA 52242 USA
[4] NHLBI, Bethesda, MD 20817 USA
[5] Univ Pittsburgh, Pittsburgh, PA 15260 USA
[6] Univ Texas SW Med Ctr Dallas, Dallas, TX 75390 USA
[7] Univ Washington, Resuscitat Outcome Consortium Clin Trial Ctr, Seattle, WA 98104 USA
[8] Hosp Sick Children, Toronto, ON M5G IX8, Canada
[9] Univ Toronto, Li Ka Shing Knowledge Inst, St Michaels Hosp, Toronto, ON M5B IW8, Canada
[10] Univ Ottawa, Ottawa Hosp, Ottawa, ON K1Y 4E9, Canada
[11] Oregon Hlth & Sci Univ, Portland, OR 97239 USA
[12] Sunnybrook Ctr Prehosp Med, Toronto, ON M8W 3S2, Canada
[13] Univ British Columbia, Fac Med, Dept Emergency Med, Vancouver, BC V5Z 1M9, Canada
[14] Edith Cowan Univ, Sch Med Sci, Fac Hlth Engn & Sci, Western Australia 6023, Australia
[15] Univ Ottawa, Ottawa Hosp Res Inst, Ottawa Hosp, Ottawa, ON K1Y 4E9, Canada
[16] Univ Pittsburgh, Pittsburgh, PA 15261 USA
[17] Univ Washington, Seattle, WA 98104 USA