title: Comparing direct and indirect laryngoscopy: Study design is crucial.
authors.affiliation: Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
authors.forename: Hui-Xian
authors.initials: HX
authors.lastname: Li
authors.affiliation: Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. Electronic address: xuefushan@aliyun.com.
authors.forename: Fu-Shan
authors.initials: FS
authors.lastname: Xue
authors.affiliation: Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
authors.forename: Ya-Yang
authors.initials: YY
authors.lastname: Liu
authors.affiliation: Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
authors.forename: Gui-Zhen
authors.initials: GZ
authors.lastname: Yang
mesh_terms: D006801:Humans; D007442:Intubation, Intratracheal; D020704:Laryngoscopes; D007828:Laryngoscopy