title: Refractory asthma coexisting with a double aortic arch: a case report and literature review.
authors.affiliation: Department of Pediatrics, Pediatric Allergy & Respiratory Disease Center, College of Medicine, Soonchunhyang University, Yongsan-gu, Seoul, Korea.
authors.forename: Hyeon Jong
authors.initials: HJ
authors.lastname: Yang
authors.forename: Bok Yang
authors.initials: BY
authors.lastname: Pyun