1. Center on Stress & Health, University of California Irvine, Irvine, CA 92697 USA
2. Department of Anesthesiology & Perioperative Care, University of California Irvine, Orange, CA 92868 USA
3. Department of Psychology, Chapman University, Orange, CA 92866
4. Yale Child Study Center, Yale University, New Haven, CT 06519 USA
5. Sue & Bill Gross School of Nursing, University of California Irvine, Irvine, CA 92697