2007
2012
Chen, Xi, Xingli Li, Biyun Qin, Jun Zheng, Jianmei He, Lu Wang, Ning Wang, Ann Hsu, and Kaveh Khoshnood. "
Older HIV-positive adults in Xiangxi, China: infection modes and associated risk factors."
Sexually transmitted diseases 39, no. 9 (2012): 716-9.
Abstract