1. VA Palo Alto Health Care System, Center for Innovation to Implementation (Ci2i) , Menlo Park, CA 94025, USA
2. Stanford University School of Medicine , Stanford, CA 94305, USA
3. Division of Primary Care & Population Health, Department of Medicine, Stanford University School of Medicine , Stanford, CA 94305, USA
4. VA Palo Alto Health Care System, Health Economics Resource Center (HERC) , Palo Alto, CA 94304, USA
5. Division of Neonatal and Developmental Medicine, Department of Pediatrics, Stanford University School of Medicine , Palo Alto, CA 94304-5660, USA
6. Division of General Internal Medicine, Department of Medicine, UC San Diego , La Jolla, CA 92093, USA