1. Department of Oto-Rhino-Laryngology; The First Affiliated Hospital; Chongqing Medical University; Chongqing China
2. Upper Airway Research Laboratory; Department of Oto-Rhino-Laryngology; Ghent University; Ghent Belgium
3. Division of Nose, Throat and Ear Diseases; Clintec; Karolinska Institute; Stockholm Sweden