Prevalence and correlates of sexual risk behaviors among drug users in western China: implications for HIV transmission.
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Y. Ruan | Xiaobo Yang | A. Abdullah | Jonathan Z. Li | H. Upur | L. Ye | Junjun Jiang | Hao Liang | Jiegang Huang | F. Wei | Y. Zou | P. Xie | B. Wei | W. Deng | B. Qin | C. Zhong | Qianqiu Wang | N. Xu | Qian Wang