[1] UNIV CALIF SAN FRANCISCO,SAN FRANCISCO GEN HOSP,DEPT GYNECOL & REPROD SCI,SAN FRANCISCO,CA
[2] UNIV CALIF SAN FRANCISCO,SAN FRANCISCO GEN HOSP,DEPT MED,SAN FRANCISCO,CA
[3] UNIV CALIF SAN FRANCISCO,SAN FRANCISCO GEN HOSP,DEPT LAB MED,SAN FRANCISCO,CA
[4] SAN FRANCISCO DEPT PUBL HLTH,DIV SEXUALLY TRANSMITTED DIS PREVENT & CONTROL,SAN FRANCISCO,CA