[1] Univ Washington, Epidemiol, Seattle, WA 98195 USA
[2] Univ Washington, Pediat, Seattle, WA 98195 USA
[3] Harbor UCLA, Dept Pediat, Torrance, CA USA
[4] Los Angeles BioMed Res Inst, Torrance, CA USA
[5] Ann & Robert H Lurie Childrens Hosp Chicago, Dept Pediat, Chicago, IL 60611 USA
[6] Ohio State Univ, Coll Med, Dept Surg, Columbus, OH 43210 USA
[7] Univ Pittsburgh, Dept Crit Care Med, Pittsburgh, PA USA
[8] Univ Calif Los Angeles, Dept Neurosurg, Mattel Childrens Hosp, Los Angeles, CA USA
[9] Univ Calif Los Angeles, Div Pediat Neurol, Mattel Childrens Hosp, Los Angeles, CA USA
[10] Univ Washington, Dept Psychiat & Behav Sci, Seattle, WA 98195 USA
[11] Univ Washington, Dept Neurol Surg, Seattle, WA 98195 USA
[12] Univ Washington, Dept Global Hlth Med, Seattle, WA 98195 USA
[13] Univ Washington, Dept Ind & Syst Engn, Seattle, WA 98195 USA
[14] Univ Washington, Sch Nursing, Seattle, WA 98195 USA
[15] Univ Washington, Dept Anesthesiol, Seattle, WA 98195 USA
[16] Univ Washington, Dept Pain Med, Seattle, WA 98195 USA