1. Keck School of Medicine, University of Southern California, Los Angeles, California, USA.
2. Department of Anesthesiology Critical Care Medicine, The Saban Research Institute at Children's Hospital Los Angeles, Los Angeles, California, USA.
3. Department of Anesthesiology, New York Presbyterian Hospital Weill Cornell Campus, New York, New York, USA.
4. Department of Psychology, University of Denver, Denver, Colorado, USA.
5. John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, USA.
6. Department of Anesthesiology, Pediatrics, and Psychiatry and Behavioral Sciences, Keck School of Medicine, University of Southern California, Los Angeles, California, USA.