Syphilis infection and sexual behaviors among sex workers:a Meta-analysis of data collected from 2010 to 2012 in  Chinese mainland
ZHANG Shi-yi,XU Shan-shan,YANG Xue-ling,LI Zhi-jun,PAN Yang,LI Bo
Journal of Jilin University(Medicine Edition) . 2014, (02): 321 -227 .  DOI: 10.13481/j.1671-587x.20140222