Affiliation: | a Health Economics Resource Center, VA Palo Alto Health Care System, 795 Willow Road, Menlo Park, CA 94025, USA b Center for Health Care Evaluation, VA Palo Alto Health Care System, 795 Willow Road, Menlo Park, CA 94205, USA c Department of Pediatrics, Stanford University School of Medicine, 750 Welch Road, Suite 315, Stanford, CA 94304, USA d Department of Health Research and Policy, HRP Redwood Building, Stanford University School of Medicine, Stanford, CA 94305, USA e Center for Primary Care Outcomes Research, Stanford University School of Medicine, 117 Encina Commons, Stanford, CA 94305, USA |