AskMayoExpert. Chronic obstructive pulmonary disease. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2016.
Longo DL, et al., eds. Chronic obstructive pulmonary disease. In: Harrison's Principles of Internal Medicine. 19th ed. New York, N.Y.: McGraw-Hill Education; 2015. http://www.accessmedicine.com. Accessed Jan. 11, 2017.
Weiss ST. Chronic obstructive pulmonary disease: Risk factors and risk reduction. http://www.uptodate.com/home. Accessed Jan. 11, 2017.
Han MK, et al. Chronic obstructive pulmonary disease: Definition, clinical manifestations, diagnosis, and staging. http://www.uptodate.com/home. Accessed Jan. 11, 2017.
Ferguson GT, et al. Management of stable chronic obstructive pulmonary disease. http://www.uptodate.com/home. Accessed Jan. 11, 2017.
What is bronchitis? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/brnchi. Accessed Jan. 9, 2017.
Jong EC, et al. Travel with chronic medical conditions. In: Travel and Tropical Medicine Manual. 4th ed. Philadelphia, Pa.: Saunders Elsevier; 2008.
Gautret P, et al. Travel-associated illness in older adults (>60 y). Journal of Travel Medicine. 2012;19:169.
Fishwick D, et al. Occupational chronic obstructive pulmonary disease: A standard of care. Occupational Medicine. 2015;65:270.
Support and community. American Lung Association. http://www.lung.org/support-and-community/. Accessed Jan. 23, 2017.
COPD treatment options. National Heart, Lung, and Blood Institute. https://www.nhlbi.nih.gov/health/educational/copd/breathing-better/treatment-options.htm. Accessed Jan. 23, 2017.