4The ENFUMOSA cross-sectional European multicentre study of the clinical phenotype of chronic severe asthma. European Network for Understanding Mechanisms of Severe Asthma [ J ]. Eur Respir J, 2003,22 ( 3 ) :470-477.
5Bousquet J, Mantzouranis E, Cruz AA, et al. Uniform definition of asthma severity, control, and exacerbations : document presented for the World Health Organization Consultation on Severe Asthma[ J]. J Allergy Clin Immunol, 2010,126 (5) :926- 938. DOI : 10. 1016/j. jaci. 2010.07. 019.
6Chung KF, Wenzel SE, Brozek JL, et al. International ERS/ATS guidelines on definition, evaluation and treatment of severe asthma [J]. Eur Respir J, 2014,43 (2) :343-373. DOI: 10. 1183/ 09031936. 00202013.
7Global Initiative for Asthma (GINA). Global strategy for asthma management and prevention 2014 (revised) [ EB/OL]. http:// www. ginasthma, org.
8Global Initiative for Asthma (GINA). Global strategy for asthma management and prevention 2015 (updated) [ EB/OL]. http:// www. ginasthma, org.