1. Center for Health Behavior Research and Departments of Medicine and Psychology, Washington University, St. Louis, Missouri 63108
2. Department of Psychology, University of Oregon, and Oregon Research Institute, Eugene, Oregon 97401
3. Center for Health Behavior Research and Department of Medicine, Washington University, St. Louis, Missouri 63108
4. Behavioral Sciences, Wyoming Valley Family Practice Residency Program, Kingston, Pennsylvania 18708
5. Hitchcock Rehabilitation Center, Aiken, South Carolina 29802