Hall, J. E., & Guyton, A. C. (2011). Textbook of Medical Physiology. Elsevier Saunders. West, J. B. (2014). Respiratory Physiology: The Essentials. Lippincott Williams & Wilkins. Tortora, G. J., & Derrickson, B. (2017). Principles of Anatomy and Physiology. Wiley. Widdicombe, J. (2006). Lung and Airway Development. Respiration Physiology & Neurobiology, 154(1-2), 291-301. Mason, R. J., Broaddus, V. C., Martin, T. R., King, T. E., & Schraufnagel, D. E. (2015). Murray and Nadel's Textbook of Respiratory Medicine (6th ed.). Saunders. Levitzky, M. G. (2018). Pulmonary Physiology (9th ed.). McGraw-Hill Education. Guzman, J. A. (2015). Disorders of the Respiratory System. Primary Care: Clinics in Office Practice, 42(2), 239-252. Weinberger, S. E., & Cockrill, B. A. (2021). Principles of Pulmonary Medicine (7th ed.). Elsevier. Global Initiative for Asthma (GINA). (2021). Global Strategy for Asthma Management and Prevention. Retrieved from [website link]. American Lung Association. (2021). Lung Disease Data. Retrieved from [website link]. Wagner, P. D. (2018). The Physiologic Basis of High-Altitude Diseases. Annals of Internal Medicine, 168(9), 677-678. Fabbri, L. M., & Rabe, K. F. (2007). From COPD to Chronic Systemic Inflammatory Syndrome? The Lancet, 370(9589), 797-799. Lundbäck, B., Lindberg, A., Lindström, M., Rönmark, E., Jonsson, A. C., Jönsson, E., ... & Larsson, L. G. (2003). Not 15 But 50% of Smokers Develop COPD?—Report from the Obstructive Lung Disease in Northern Sweden Studies. Respiratory Medicine, 97(2), 115-122. British Lung Foundation. (2021). Occupational Lung Disease. Retrieved from [website link]. World Health Organization (WHO). (2021). Ambient Air Pollution: Health Impacts.