title: Study on the Postoperative Pain Calls for More Methods to Control Potential Bias.
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Han
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Lan
authors.initials: L
authors.lastname: Jin
authors.forename: Jian-She
authors.initials: JS
authors.lastname: Li
authors.affiliation: Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050; National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Beijing 100050, China.
authors.forename: Zhong-Tao
authors.initials: ZT
authors.lastname: Zhang
mesh_terms: D015982:Bias; D006801:Humans; D010147:Pain Measurement; D010149:Postoperative Pain