5Irwin R S, Boulet L P, Cloutier M M, et al. Managing cough as a defence mechanism and as a symptom: a consensus panel report of the American College of Chest Physicians [J]. Chest, 1998, 114 (suppl) : 133S.
6Richard S h'win, Madison J Mark. The diagnosis and treatment of cough [J]. NEngJMed, 2000, 343 (23): 1715.
7Tardif C, Bonmarchand G, Gibon JF, et al. Respiratory response to C02 in patients with chronic obstructive pul monary disease in acute respiratory failure[J]. Eur RespirJ, 1993, 6(5): 619.