[1] Univ Washington, Dept Psychiat & Behav Sci, 1959 NE Pacific St,Box 357238, Seattle, WA 98195 USA
[2] Univ North Texas Hlth Sci Ctr, Sch Publ Hlth, Dept Hlth Behav & Hlth Syst, Ft Worth, TX USA
[3] Univ Oregon, Dept Counseling Psychol & Human Serv, Eugene, OR 97403 USA
[4] Univ Washington, Dept Family Med, Seattle, WA 98195 USA
[5] Loyola Marymount Univ, Dept Psychol, Los Angeles, CA 90045 USA
[6] RAND Corp, Santa Monica, CA USA
[7] Univ Houston, Dept Psychol, Houston, TX 77004 USA