Cahill K, Stead LF, Lancaster T (2012). Nicotine receptor partial agonists for smoking cessation. Cochrane Database Syst Rev 4: CD006103. FDA.gov. FDA Approves Breo Ellipta to treat chronic obstructive pulmonary disease. FDA.gov. FDA approves a new drug to treat chronic obstructive pulmonary disease. Global Initiative for Chronic Obstructive Lung Disease. Updated 2010.