1. Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease (2022).
2. Agarwal, A. K., Raja, A., Brown, B. D. Chronic Obstructive Pulmonary Disease, in StatPearls (Treasure Island (FL, 2022).
3. Divo, M. & Celli, B. R. Multimorbidity in patients with chronic obstructive pulmonary disease. Clin. Chest Med. 41(3), 405–419 (2020).
4. Anthony, S. & Fauci, A. (eds)17th edn, 747–784 (McGraw Hill, 2009).
5. (WHO), W.H.O. Available from: https://www.who.int/news-room/fact-sheets/detail/chronic-obstructive-pulmonary-disease-(copd).