1. School of Social Work, University of Washington, 4101 15th Avenue NE, Seattle, WA 98105, USA
2. West Los Angeles Veterans Affairs Medical Center and David Geffen School of Medicine, Department of Psychiatry and Biobehavioral Sciences, University of California at Los Angeles, Los Angeles, CA 90095, USA
3. Rand Corporation, 1776 Main Street, Santa Monica, CA 90401-3208, USA
4. Yakima Valley Farm Workers Clinic, Behavioral Health Services, 918 E. Mead, Yakima, WA 98902, USA
5. Center for Health Studies, Group Health Cooperative Research Department, 1730 Minor Avenue, Suite 1600, Seattle, WA 98101, USA