1. RAND Corporation, Santa Monica, California (Ober, Hunter, McCullough, Leamon, Watkins); David Geffen School of Medicine at University of California, Los Angeles, Los Angeles (McCreary, Beas, Montero, Tarn, Bromley); Los Angeles County Department of Health Services, Los Angeles (Hurley); Los Angeles County Department of Mental Health, Los Angeles (Sheehe, Martinez)