1. University of San Diego Hahn School of Nursing and Health Science, San Diego, California.
2. Child and Adolescent Services Research Center, Rady Children's Hospital and Health Center, San Diego, California.
3. University of San Diego School of Leadership and Education Sciences, San Diego, California.
4. Department of Pediatrics and the Centers for Primary Care and Outcomes Research and Health Policy, Stanford University School of Medicine, Stanford, California.