HIV and Syphilis Prevalence and Associated Factors Among Young Men Who Have Sex with Men in 4 Cities in China Suo Wei • Hongbo Zhang • Jun Wang • Dandan Song • Yuwen Duan • Fang Yu • Min She • Min Wang • Huan Zhang Published online:

https://drive.google.com/file/d/0B4lLBVh29JUYdUxDNEZseUx1SWM/view?usp=sharing