[1] Harvard Medical School/Harvard Pilgrim Health Care Institute,Department of Population Medicine
[2] Group Health Research Institute,Institute for Health Research
[3] Kaiser Permanente Colorado,Department of Family Medicine and Adult and Child Center for Health Outcomes and Delivery Science, School of Medicine
[4] University of Colorado,Department of Family Medicine and Public Health, School of Medicine
[5] University of California San Diego,undefined
[6] LIVESTRONG Foundation,undefined
[7] Texas Department of State Health Services,undefined