[1] Univ Pittsburgh, Sch Med, Dept Crit Care Med, Pittsburgh, PA 15260 USA
[2] Oregon Hlth & Sci Univ, Dept Med Informat & Clin Epidemiol, Portland, OR 97201 USA
[3] Phoenix Childrens Hosp, Barrow Neurol Inst, Phoenix, AZ USA
[4] Loma Linda Univ, Sch Med, Dept Pediat, Div Child Neurol, Loma Linda, CA 92350 USA
[5] Univ Utah, Sch Med, Salt Lake City, UT 84112 USA
[6] Univ Washington, Sch Med, Seattle, WA 98195 USA
[7] Weill Cornell Med Coll, New York, NY USA
[8] Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Newark, NJ 07103 USA
[9] Duke Univ, Sch Med, Durham, NC 27706 USA
[10] Univ British Columbia, British Columbias Childrens Hosp, Vancouver, BC V5Z 1M9, Canada
[11] Harvard Univ, Sch Med, Cambridge, MA 02138 USA
[12] Childrens Hosp Boston, Boston, MA USA
[13] Northwestern Univ, Feinberg Sch Med, Evanston, IL 60208 USA
[14] Oregon Hlth & Sci Univ, Doernbecher Childrens Hosp, Portland, OR 97201 USA