Ali Khaki-Sedigh, J. Kamali,

mehrnaz rasooli-nejad iranian research center for hiv/aids, iranian institute for reduction of high-risk behaviors, tehran university of medical sciences, tehran, iran. and department of infectious diseases, school of medicine, tehran university of medical sciences, tehran, iran. maryam khazaee-pool department of health education and promotion, school of public health, zanjan university of medical sciences, zanjan, iran. ladan abbasian iranian research center for hiv/aids, iranian institute for reduction of high-risk behaviors, tehran university of medical sciences, tehran, iran. zahra bayat jozani iranian research center for hiv/aids, iranian institute for reduction of high-risk behaviors, tehran university of medical sciences, tehran, iran. sara ahsani-nasab 1iranian research center for hiv/aids, iranian institute for reduction of high-risk behaviors, tehran university of medical sciences, tehran, iran. banafsheh moradmand badie discipline of public health, school of medicine, flinders university, south australia.