title: Challenges arising from China's two-child policy.
authors.affiliation: School of Public Health, Central South University, Changsha, Hunan, China; Hunan Provincial Maternal and Child Care Hospital, Changsha, Hunan, China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Gong
authors.affiliation: University of Washington, Beijing, China; Sun Yat-Sen University School of Public Health, Sun Yat-Sen Global Health Institute, Guangzhou 510080, China. Electronic address: xudong5@mail.sysu.edu.cn.
authors.forename: Dong Roman
authors.initials: DR
authors.lastname: Xu
authors.affiliation: Department of Psychiatry, University of Rochester Medical Center, Rochester, NY, USA.
authors.forename: Eric D
authors.initials: ED
authors.lastname: Caine
mesh_terms: D002681:China; D005191:Family Characteristics; D006801:Humans; D011155:Population Control; D012922:Social Change