Written by: Anna Nicholson | Last reviewed: July 2015.
- American Thoracic Society / European Respiratory Society Task Force. Standards for the Diagnosis and Management of Patients with COPD: Guide for Patients [Internet]. New York: American Thoracic Society;2004 [updated 2005 September 8].]
- National Heart, Lung and Blood Institute. “What is COPD?” Chronic Obstructive Pulmonary Disease. Available at: http://www.nhlbi.nih.gov/health/healthtopics/topics/copd/ [Accessed 30 November 2014.]]
- World Health Organization. “What is COPD?” Chronic obstructive pulmonary disease (COPD). Available at: http://www.who.int/respiratory/copd/en/ [Accessed 21 November 2014.]]
- American Lung Association. “Understanding COPD.” Chronic Obstructive Pulmonary Disease. Available at: http://www.lung.org/lung-disease/copd/about-copd/understanding-copd.html?print=t [Accessed 30 November 2014.]]
- Mayo Clinic. “COPD Causes.” COPD. Available athttp://www.mayoclinic.org/diseases-conditions/copd/basics/causes/con-20032017 [Accessed 2 December 2014.]