1. App use frequency and condomless anal intercourse among men who have sex with men in Beijing, China: a cross-sectional study. (October 2019) Authors: Luo, Qianqian; Wu, Zunyou; Chen, Zihuang; Ma, Yue; Mi, Guodong; Liu, Xuejiao; Xu, Jie; Rou, Keming; Zhao, Yan; Scott, Sarah R Journal: International journal of STD & AIDS Issue: Volume 30:Number 12(2019) Page Start: 1146 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗