1. Global initiative for chronic Obstructive Lung Disease: Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease. Revised 2016.
2. Cazzola M, Page CP, Calzetta L, Matera MG. Pharmacology and therapeutics of bronchodilators. Pharmacol Rev. 2012;64:450–504.
3. Racke´ K, Juergens UR, Matthiesen S. Control by cholinergic mechanisms. Eur J Pharmacol. 2006;533:57–68.
4. Carstairs JR, Nimmo AJ, Barnes PJ. Autoradiographic visualization of beta-adrenoceptor subtypes in human lung. Am Rev Respir Dis. 1985;132:541–7.
5. Johnson M. The β-adrenoceptor. Am J Respir Crit Care Med. 1998;158:S146–53.