title: In Response.
authors.affiliation: Department of Anesthesiology and Critical Care Medicine, Peking University First Hospital, Beijing, China, wangdongxin@hotmail.com.
authors.forename: Ting
authors.initials: T
authors.lastname: Ding
authors.forename: Chun-Mei
authors.initials: CM
authors.lastname: Deng
authors.forename: Dong-Xin
authors.initials: DX
authors.lastname: Wang
mesh_terms: D015360:Analgesia, Epidural; D019052:Depression, Postpartum / Q000517:prevention & control*; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy