5Smith J, Woodcock A. New developments in the objective assessment of cough [ J ]. Lung,2008,186 ( Suppl 1 ) : S48 - S54.
6Irwin RS. Assessing cough severity and efficacy of therapy in clini- cal research: ACCP evidence-based clinical practice guidelines [ J ]. Chest,2006,129:232 - 237.
7Falconer A, Oldman C, Helms P. Poor agreement between reported and recorded nocturnal cough in asthma [ J ]. Pediatr Pulmonol, 1993,15:209 -211.
8Marsden PA, Smith JA, Kelsall AA, et al. A comparison of objective and subjective measures of cough in asthma[ J ]. J Allergy ClinIm- munol,2008,122 (5) :903 - 907.
9Eccles R. The powerful placebo in cough studies? [ J ]. Pulm Pharmacol Ther,2002,15 ( 3 ) :303 - 308.
10Lee PC, Jawad MS, Hull JD, et al. The antitussiveeffect of placebo treatment on cough associatedwithacute upper respiratory infection [ J ~. Psyehosom Med ,2005 ,67 ( 2 ) :314 - 317.
