8Johnson D,Osborn LM. Cough variant asthma: a review of clinical literature. J Asthma,1991,28:85-90.
9Fujimura M, Ogawa H, Nishizawa Y, et al. Comparison of atopic cough with cough variant asthma:is atopic cough a precursor of asthma? Thorax,2003,58:14-18.