The prevalences of <it>Neisseria gonorrhoeae and Chlamydia trachomatis</it> infections among female sex workers in China oleh Chen Xiang-Sheng, Yin Yue-Ping, Liang Guo-Jun, Wang Qian-Qiu, Jiang Ning, Liu Qiao, Fu Geng-Feng, Yang Bin, Zhou Yu-Jiao, Shi Mei-Qin, Wang Baoxi