[1] Baylor Coll Med, Dept Med, Sect Cardiol, 2002 Holcombe Blvd, Houston, TX 77030 USA
[2] Baylor Coll Med, Dept Med, Houston, TX 77030 USA
[3] Stanford Univ, Div Cardiovasc Med, Stanford Med, Stanford, CA 94305 USA
[4] Stanford Univ, Stanford Cardiovasc Inst, Stanford Med, Stanford, CA 94305 USA
[5] Houston Methodist Res Inst, Ctr Outcomes Res, Houston, TX USA
[6] West Virginia Univ, Dept Med, Sch Med, Morgantown, WV 26506 USA
[7] US Dept Vet Affairs, Hlth Policy Qual & Informat Program, Ctr Innovat Qual Effectiveness & Safety, Houston, TX USA
[8] US Dept Vet Affairs, Res & Dev, Michael E DeBakey VA Med Ctr, Houston, TX USA
[9] Baylor Coll Med, Dept Med, Sect Hlth Serv Res, Houston, TX 77030 USA
[10] US Dept Vet Affairs, Sect Cardiol, Michael E DeBakey Vet Affairs Med Ctr, Houston, TX USA
[11] Baylor Coll Med, Dept Med, Sect Cardiovasc Res, Houston, TX 77030 USA