1. Asthma + Lung UK What is asthma?; 2021. Available from: https://www.asthma.org.uk/advice/understanding-asthma/what-is-asthma/. Accessed December 11 11, 2023.
2. GINA Difficult to Treat & Severe Asthma in adolescent and adult patients. Diagnosis and Management. A GINA pocket guide for health professionals. Version 3 0.April 2021; 2023. Available from: https://ginasthma.org/wp-content/uploads/2021/08/SA-Pocket-guide-v3.0-SCREEN-WMS.pdf. Accessed December 11, 2023.
3. Difficult asthma
4. Comorbidities associated with severe asthma
5. Cluster Analysis and Clinical Asthma Phenotypes