[1] Univ Social Welf & Rehabil Sci, Social Determinants Hlth Res Ctr, Tehran, Iran
[2] Kerman Univ Med Sci, Inst Futures Studies Hlth, HIV STI Surveillance Res Ctr, Kerman, Iran
[3] Kerman Univ Med Sci, WHO Collaborating Ctr HIV Surveillance, Kerman, Iran
[4] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA USA
[5] Univ Tehran Med Sci, Iranian Res Ctr, HIV AIDS, Iranian Inst Reduct High Risk Behav, Tehran, Iran
[6] Univ Social Welf & Rehabil Sci, Social Welf Management Res Ctr, Tehran, Iran
[7] Kermanshah Univ Med Sci, Social Dev & Hlth Promot Res Ctr, Hlth Inst, Kermanshah, Iran
[8] Univ Groningen, Dept Sociol, Groningen, Netherlands
[9] Univ Oxford, Nuffield Coll, Oxford, England