1. GlaxoSmithKline. GSK INCRUSE™ ELLIPTA® prescribing information. http://www.gsksource.com/gskprm/htdocs/documents/INCRUSE-ELLIPTA-PI-PIL.PDF. Date last updated: June 2014. Date last accessed: October 16 2015.
2. GlaxoSmithKline. GSK ANORO™ ELLIPTA® prescribing information. https://www.gsksource.com/gskprm/htdocs/documents/ANORO-ELLIPTA-PI-MG.PDF. Date last updated: May 2014. Date last accessed: October 16 2015.
3. European Medicines Agency. Anoro: EPAR - product information. http://www.ema.europa.eu/docs/en_GB/document_library/EPAR_-_Product_Information/human/002751/WC500168424.pdf. Date last updated: June 16 2014. Date last accessed: October 16 2015.
4. European Medicines Agency. Incruse: EPAR - product information. http://www.ema.europa.eu/docs/en_GB/document_library/EPAR_-_Product_Information/human/002809/WC500167430.pdf. Date last updated: February 13 2013. Date last accessed: October 16 2015.
5. Global Initiative for Chronic Obstructive Lung Disease. Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease. http://www.goldcopd.org/guidelines-global-strategy-for-diagnosis-management.html. Date last updated: January 2015. Date last accessed: October 16 2015.