[1] Ctr Dis Control & Prevent, Natl Ctr HIV STD & TB Prevent, Div HIV AIDS Prevent Surveillance & Epidemiol, Atlanta, GA 30333 USA
[2] St Louis Univ, Sch Publ Hlth, St Louis, MO 63103 USA
[3] Los Angeles Cty Dept Hlth Serv, Los Angeles, CA USA
[4] Johns Hopkins Univ, Sch Hyg & Publ Hlth, Baltimore, MD USA
[5] New York Blood Ctr, New York, NY 10021 USA
[6] Florida Dept Hlth & Rehabil Serv, Tallahassee, FL 32399 USA
[7] San Francisco Dept Hlth, San Francisco, CA USA
[8] Univ Texas, SW Med Ctr, Dallas, TX 75230 USA
[9] Publ Hlth Seattle & King Cty, Seattle, WA USA
[10] New York City Dept Hlth, New York, NY 10013 USA