[1] Univ Calif, Dept Anesthesiol & Perioperat Care, 505 S Main St,Suite 940, Orange, CA 92868 USA
[2] Univ Calif, Ctr Stress & Hlth, Orange, CA USA
[3] Childrens Hosp Orange Cty, Orange, CA USA
[4] Univ Calif Irvine, Sue & Bill Gross Sch Nursing, Irvine, CA USA
[5] Univ Calif Irvine, Dept Emergency Med, Irvine, CA USA
[6] Quinnipiac Univ, Frank H Netter MD Sch Med, North Haven, CT USA