[1] Georgetown Univ, Med Ctr, Dept Family Med, Washington, DC 20007 USA
[2] Georgetown Univ, Med Ctr, Dept Med, Washington, DC 20007 USA
[3] Montefiore Med Ctr, Dept Med, Div Gen Internal Med, Bronx, NY 10467 USA
[4] City Hope Natl Med Ctr, Duarte, CA 91010 USA
[5] Univ Calif San Francisco, San Francisco, CA 94143 USA
[6] Suny Downstate Med Ctr, Brooklyn, NY 11203 USA
[7] CORE Ctr John H Stroger Jr Hosp Cook Cty, Chicago, IL USA
[8] NIAID, Basic Sci Program, NIH, Bethesda, MD 20892 USA