Fanta CH, et al. Treatment of acute exacerbation of asthma in adults. UpToDate. http://www.uptodate.com/contents/treatment-of-acute-exacerbations-of-asthma-in-adults. Updated November 12, 2015. Accessed June 2016.
What kind of medicines are there for COPD, what are anticholinergic medications? American Thoracic Society. http://www.thoracic.org/clinical/copd-guidelines/for-patients/what-kind-of-medications-are-there-for-copd/what-are-anticholinergic-medications.php. Updated February 2015. Accessed June 2016.
Farne HA, Cates CJ. Long-acting beta2-agonist in addition to tiotropium versus either tiotropium or long-acting beta2-agonist alone for chronic obstructive pulmonary disease. Cochrane Database Syst Rev. 2015 Oct 22;10:CD008989. doi: 10.1002/14651858.CD008989.pub3. PMID: 26490945. http://www.ncbi.nlm.nih.gov/pubmed/26490945. Accessed June 2016.
Quirce S, Domínguez-Ortega J, Barranco P. Anticholinergics for treatment of asthma. J Investig Allergol Clin Immunol. 2015;25(2):84-93. PMID: 25997301. http://www.ncbi.nlm.nih.gov/pubmed/25997301. Accessed January 2016.
Fanta CH et al. An overview of asthma management. UpToDate. http://www.uptodate.com/contents/an-overview-of-asthma-management. Updated May 31, 2016. Accessed June 2016.