Liu, G., Lu, H., Wang, J., Xia, D., Sun, Y., Mi, G., & Wang, L. (2015). Incidence of HIV and Syphilis among Men Who Have Sex with Men (MSM) in Beijing: An Open Cohort Study. PLoS One.

Liu, Guowu, Hongyan Lu, Juan Wang, Dongyan Xia, Yanming Sun, Guodong Mi, and Liming Wang. "Incidence of HIV and Syphilis Among Men Who Have Sex With Men (MSM) in Beijing: An Open Cohort Study." PLoS One 2015.

Liu, Guowu, et al. "Incidence of HIV and Syphilis Among Men Who Have Sex With Men (MSM) in Beijing: An Open Cohort Study." PLoS One 2015.