title: Head extension angle required for direct laryngoscopy with the McCoy laryngoscope blade.
authors.forename: K
authors.initials: K
authors.lastname: Sugiyama
authors.forename: K
authors.initials: K
authors.lastname: Yokoyama
mesh_terms: D000328:Adult; D006257:Head / Q000033:anatomy & histology; D006801:Humans; D007828:Laryngoscopy / Q000379:methods*