title: Erratum to: Sexual behavior of migrant workers in Shanghai, China.
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Dai
authors.affiliation: Nutrition Department, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Gao
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Gong
authors.affiliation: Huangdu Community Health Service Center, Jiading, Shanghai, China.
authors.forename: Xiuping
authors.initials: X
authors.lastname: Xia
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Yang
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Shen
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Gu
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Tianhao
authors.initials: T
authors.lastname: Wang
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Huangdu Community Health Service Center, Jiading, Shanghai, China.
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Shen
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China. zhu_shanzhu@126.com.
authors.forename: Shanzhu
authors.initials: S
authors.lastname: Zhu
authors.affiliation: Department of General Practice, Zhongshan Hospital of Fudan University, Shanghai, China. zhigang_pan@163.com.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Pan