1. Kaiser Permanente Center for Health Research, Portland, Oregon, United States
2. OCHIN, Inc., Portland, Oregon, United States
3. Department of Primary Care, Kaiser Permanente Northwest, Portland, Oregon, United States
4. Kaiser Permanente Mid-Atlantic Permanente Research Institute, Rockville, Maryland, United States
5. Michigan State University, East Lansing, Michigan, United States
6. Cowlitz Family Health Center, Longview, Washington, United States
7. Community HealthNet Health Centers, Gary, Indiana, United States