title: Progress in difficult airway management.
authors.affiliation: Department of Anesthesiology, Dokkyo Medical University, Koshigaya Hospital, 2-1-50 Minamikoshigaya, Koshigaya, Saitama, 343-8555, Japan. asaita@dokkyomed.ac.jp.
authors.forename: Takashi
authors.identifier: http://orcid.org/0000-0001-9202-9932
authors.initials: T
authors.lastname: Asai