[1] Baylor Coll Med, Dept Surg, Houston, TX 77030 USA
[2] Univ Calif San Francisco, Dept Family Med, San Francisco, CA 94143 USA
[3] Amer Hosp Assoc, Chicago, IL USA
[4] LSU Hlth Sci Ctr Shreveport, Dept Surg, Div Surg Oncol, Shreveport, LA USA
[5] LSU Hlth Sci Ctr Shreveport, Dept Surg, Surg Oncol, Shreveport, LA USA
[6] Peoples Community Clin, Austin, TX USA
[7] Baylor Coll Med, Houston, TX 77030 USA
[8] Univ Calif Davis, Dept Internal Med, Populat Care & Value, Sacramento, CA 95817 USA
[9] Univ Texas Austin, Dept Pediat, Pediat Populat Hlth & Publ Policy, Austin, TX 78712 USA
[10] Univ South Dakota, Sanford Sch Med, Dept Pediat, Pediat, Sioux Falls, SD USA
[11] Univ Colorado Anschutz Med Campus, Farley Hlth Policy Ctr, Aurora, CO USA
[12] George Washington Univ, Sch Med & Hlth Sci, Pediat, Washington, DC 20052 USA
[13] Childrens Natl Hosp, Div Emergency Med, Washington, DC USA
[14] Univ Southern Calif, Dept Anesthesiol, Los Angeles, CA 90007 USA
[15] House Med, Los Angeles, CA USA
[16] Johns Hopkins Univ Hosp, Emergency Gen Surg, Baltimore, MD 21287 USA
[17] Southern Illinois Univ, Sch Med, Dept Populat Sci & Policy, Springfield, IL USA
[18] Southern Illinois Univ, Sch Med, Pediat Med Humanities & Law, Springfield, IL USA
[19] Emory Univ, Sch Med, Grady Primary Care Ctr, Atlanta, GA USA
[20] Emory Univ, Sch Med, Dept Med, Atlanta, GA USA
[21] Univ Arizona, Coll Med Phoenix, Phoenix, AZ USA
[22] Phoenix Vet Affairs Med Ctr, Phoenix, AZ USA