[1] Michael E DeBakey VA Med Ctr, Ctr Innovat Qual Effectiveness & Safety IQuESt, Houston, TX USA
[2] Baylor Coll Med, Sect Gastroenterol & Hepatol, Houston, TX 77030 USA
[3] Michael E DeBakey VA Med Ctr, Houston, TX USA
[4] Baylor Coll Med, Dept Med, Sect Hlth Serv Res, Houston, TX 77030 USA
[5] Palo Alto Vet Affairs Med Ctr, Ctr Innovat Implementat Ci2i, Palo Alto, CA USA
[6] Stanford Univ, Div Gen Med Disciplines, Palo Alto, CA 94304 USA