[1] Univ Bristol, Sch Social & Community Med, Bristol, Avon, England
[2] Ctr Dis Control & Prevent, Div Viral Hepatitis, Natl Ctr HIV AIDS Viral Hepatitis STD & TB Preven, Atlanta, GA USA
[3] Univ Calif San Diego, Div Global Publ Hlth, San Diego, CA USA
[4] South Caucasus CDC Off, Global Dis Detect, Div Global Hlth Protect, Atlanta, GA USA
[5] Alternat Georgia, Addict Res Ctr, Tbilisi, Georgia
[6] Curatio Int Fdn, Tbilisi, Georgia
[7] Infect Dis AIDS & Clin Immunol Res Ctr, Tbilisi, Georgia
[8] SUNY Albany, Dept Epidemiol & Biostat, Albany, NY 12222 USA
[9] CDC Fdn, Atlanta, GA USA
[10] Natl Ctr Dis Control & Publ Hlth Georgia, Atlanta, GA USA
[11] Minist Labor Hlth & Social Affairs Georgia, Tbilisi, Georgia