Asthma With Hypersecretion-associated Gene for Cystic Fibrosis

Primary objective: Determine the presence of genetic variants (mutations and / or polymorphisms) of the CFTR gene in patients with asthma with or without bronchial mucus hypersecretion. Secondary objectives: To identify genetic variants (mutations and / or polymorphisms) of the most common CFTR gene in the asthmatic population. -To define the inflammatory phenotype of asthma with bronchial mucus hypersecretion. -To compare the severity, control, quality of life and frequency of exacerbations of asthma patients with or without bronchial mucus hypersecretion