Guo Yan-fang, Ma Li-ying, Yuan Lin, Wang Shu-hua, Sun Jian-ping, Xu Wei-si, Xu Jian-qing, Xing Hui, Ong Kun-xue, Zhang Xiao-yan, Ruan Yu-hua, Zhang Yao-xin, Shao Yi-ming
State Key Laboratory for Infection Diseases Prevention and Control, National Centre for AIDS/STD Control and Prevention, Chinese Centre for Disease Control and Prevention, Beijing 100050, China.
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