[1] Stanford Univ, VA Palo Alto Hlth Care Syst, Stanford, CA USA
[2] Univ Houston, Tilman J Fertitta Family Coll Med, Houston, TX USA
[3] USC Sch Med, VA Palo Alto Healthcare Syst, Los Angeles, CA USA
[4] VA Palo Alto Hlth Care Syst, Stanford, CA USA
[5] Stanford Univ, Sch Med, Stanford, CA USA
[6] Univ Calif Davis, Davis, CA USA
[7] Stanford Univ, Stanford, CA USA
[8] Stanford Univ, VA Ctr Innovat Implementat, Stanford, CA USA
[9] Stanford Univ, Dept Primary Care & Populat Hlth, Sch Med, Stanford, CA USA