Corrigendum to "A multicenter, randomized, double-blind dose-ranging study of glycopyrrolate/formoterol fumarate fixed-dose combination metered dose inhaler compared to the monocomponents and open-label tiotropium dry powder inhaler in patients with moderate-to-severe COPD" [Respir. Med. 120 November 2016 16–24]. (August 2017) - Tashkin, Donald P.; Martinez, Fernando J.; Rodriguez-Roisin, Roberto; Fogarty, Charles; Gotfried, Mark; Denenberg, Michael; Gottschlich, Gregory; Donohue, James F.; Orevillo, Chad; Darken, Patrick; St Rose, Earl; Strom, Shannon; et al.