1. Department of Psychosocial and Community Health, University of Washington School of Nursing, Seattle, WA
2. Group Health Research Institute, Seattle, WA
3. Department of Internal Medicine and Epidemiology, Wake Forest University School of Medicine, Winston-Salem, NC
4. Department of Psychology, Virginia Commonwealth University, Richmond, VA
5. Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, WA