Correction to: Indacaterol: a new long-acting b2-agonist in the management of chronic obstructive pulmonary disease Steiropoulos P, Papanas N, Nena E, et al. Indacaterol: a new long-acting b2-agonist in the management of chronic obstructive pulmonary disease Expert Opin Pharmacother 2012:13(7):1015-29