Predictors of HIV infection and prevalence for syphilis infection among injection drug users in China: Community-based surveys along major drug trafficking routes
Yujiang Jia*, Fan Lu*, Gang Zeng, Xinhua Sun, Yan Xiao, Lin Lu, Wei Liu, Mingjian Ni, Shuquan Qu, Chunmei Li, Jianbo Liu, Pingsheng Wu and Sten H Vermund