title: Reply to Letter: Different methods are mixed up in the meta-analysis.
authors.affiliation: Department of Emergency Medicine, Maimonides Medical Center, Brooklyn, NY, USA.
authors.forename: Eric H
authors.initials: EH
authors.lastname: Chou
authors.affiliation: Department of Emergency Medicine, Maimonides Medical Center, Brooklyn, NY, USA.
authors.forename: Eitan
authors.initials: E
authors.lastname: Dickman
authors.affiliation: Department of Emergency Medicine, National Taiwan University Hospital Yunlin Branch, Douliou, Taiwan; Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan. Electronic address: cclee100@gmail.com.
authors.forename: Chien-Chang
authors.initials: CC
authors.lastname: Lee
mesh_terms: D006801:Humans; D007442:Intubation, Intratracheal / Q000379:methods*; D008168:Lung / Q000000981:diagnostic imaging*; D014132:Trachea / Q000000981:diagnostic imaging*; D018084:Ultrasonography, Interventional