1. Kaiser Permanente Washington Health Research Institute, Seattle, WA, United States. Dr. Boudreau, Affiliation at the time of the research, no longer affiliated
2. Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, United States
3. Department of Rehabilitation Medicine, University of Washington, Seattle, WA, United States
4. Department of Biostatistics, University of Washington, Seattle, WA, United States
5. Genentech, Inc., South San Francisco, CA, United States (Current Primary Affiliation)