Gender differences among PWID with regards to HIV transmission risk in St. Petersburg, Russia. (1st February 2017) - Gnatienko, Natalia; Tsui, Judith; Wagman, Jennifer A.; Cheng, Debbie M.; Raj, Anita; Blokhina, Elena; Toussova, Olga; Forman, Leah; Lioznov, Dmitry; Samet, Jeffrey H.