1. School of Nursing, University of Washington, Seattle, WA 98195, USA
2. Department of Internal Medicine, School of Medcine, University of California San Francisco, Fresno, CA 94143, USA
3. Division of Pulmonology and Sleep Medicine, School of Medicine, Stanford University, Palo Alto, CA 94305, USA
4. Department of Pediatrics, University of Alberta, Edmonton, AB T6G 1C9, Canada
5. VISN 20 Mental Illness Research, Education and Clinical Center, Seattle, WA 98108, USA
6. Department of Psychiatry and Behavioral Sciences, School of Medicine, University of Washington, Seattle, WA 98195, USA
7. Division of Pediatric Pulmonology and Sleep Medicine, School of Medicine, University of Washington, Seattle, WA 98195, USA