Dal Negro, R. W.; Tognella, S.; Guerriero, M.; Micheletto, C. Prevalence of Tracheobronchomalacia and Excessive Dynamic Airway Collapse in Bronchial Asthma of Different Severity. Multidiscip Respir Med 2013, 8 (9). https://doi.org/10.4081/mrm.2013.509.