8Vignola AM, Chanez P, Chiappara C, et al. Transforming growth factor- beta expression in mucosal biopsies in asthma and chronic bronchitis[J]. Am J Respir Crit Care Med,1997, 156(1 ): 591 - 599.
9Yssel H , Groux H .Characterization of T cell subpopulations involved in the pathogenesis of asthma [J]. Int Arch Allergy Im- munol,2000,121 (1): 10-18.
10Schlemer RP, Benenati Sr , Friedman B, et al.Do cy tokines play a role in leukocy to r ecruitment and act ivatio n in t he lung ? Am Rev Respir Dis 1991; 143: 1169.
