1. 1. Isono S, Remmers JE (1994) Anatomy and physiology of upper airway obstruction. In: Kryger HH, ed. Principles and practice of sleep medicine. 2nd ed. Philadelphia: Saunders 642-656 .
2. 2. Stradling JR, Davies RJ (2004) Sleep. 1: obstructive sleep apnoea/hypopnoea syndrome: definitions, epidemiology, and natural history. Thorax 59: 73-78 .
3. 3. Ye J, Han D, Zhang Y, Wang J, Yang Q, et al. (2000) The study about the characteristics of upper airway in obstructive sleep apnea syndrome. Zhonghua Er Bi Yan Hou Ke Za Zhi 35: 278-281.
4. 4. Boudewyns AN，De Backer WA，Van de Heyning PH (2001) Pattern of upper airway obstruction during sleep before and after uvulopalatopharyngoplasty in patients with obstructive sleep apnea. Sleep Med 2: 309-315 ．
5. 5. Li S, Dong X, Shi H, Dong W, Qu S, et al. (2002) Localization of upper airway stricture in patients with obstructive sleep apnea syndrome by CT scan. Zhonghua Er Bi Yan Hou Ke Za Zhi 37: 133-136 .