[1] Texas Tech Univ, Off Med Educ, Paul L Foster Sch Med, Hlth Sci Ctr, 5001 El Paso Dr, El Paso, TX 79905 USA
[2] Vanderbilt Univ, Med Ctr, Dept Med, Div Hematol Oncol, Nashville, TN USA
[3] Univ Texas Hlth San Antonio, Joe R & Teresa Lozano Long Sch Med, Dept Med, San Antonio, TX USA
[4] George Washington Sch Med & Hlth Sci, Dept Med, Washington, DC USA
[5] Univ Texas Med Branch, Dept Internal Med, Galveston, TX 77555 USA
[6] Ohio State Univ, Coll Med, Columbus, OH 43210 USA
[7] Harvard Med Sch, Dept Med, Brigham & Womens Hosp, Boston, MA 02115 USA
[8] Univ Calif San Francisco, Sch Med, Dept Med, San Francisco, CA USA
[9] Univ S Florida, Morsani Coll Med, Tampa, FL 33620 USA
[10] Penn State Coll Med, Dept Med, Hershey, PA USA
[11] Beth Israel Deaconess Med Ctr, Dept Med, Boston, MA 02215 USA
[12] Baylor Coll Med, Dept Med, Houston, TX 77030 USA
[13] Albany Med Coll, Dept Med, Albany, NY 12208 USA
[14] Alliance Acad Internal Med, Alexandria, VA USA
[15] Univ Chicago, Pritzker Sch Med, Dept Med, Chicago, IL 60637 USA