title: [External validity and its evaluation used in clinical trials].
authors.affiliation: Department of Evidence-Based Medicine and Clinical Epidemiology, West China Hospital, Sichuan University, Chengdu 610041, China.
authors.forename: Yu-Xia
authors.initials: YX
authors.lastname: Wu
authors.forename: De-Ying
authors.initials: DY
authors.lastname: Kang
authors.forename: Qi
authors.initials: Q
authors.lastname: Hong
authors.forename: Jia-Liang
authors.initials: JL
authors.lastname: Wang
mesh_terms: D016032:Randomized Controlled Trials as Topic; D015203:Reproducibility of Results