[1] Rice Univ, Baker Inst Publ Policy, Houston, TX 77005 USA
[2] Rice Univ, Dept Econ, Houston, TX 77005 USA
[3] Baylor Coll Med, Dept Med, Houston, TX 77030 USA
[4] Baylor Coll Med, Dept Family & Community Med, Houston, TX 77030 USA
[5] Baylor Coll Med, Houston, TX 77030 USA
[6] Blue Cross Blue Shield Texas, Richardson, TX USA
[7] Univ Texas Hlth Sci Ctr Houston, Sch Publ Hlth, Div Management Policy & Community Hlth, Houston, TX 77030 USA
[8] Michael E DeBakey VA Med Ctr, Med Care Serv Line, Houston, TX USA
[9] Harris Hlth Syst, Houston, TX USA
[10] Hlth Care Serv Corp, Chicago, IL USA