Baloira A, Abad A, Fuster A, et al. Int J Chron Obstruct Pulmon Dis. 2021;16:1021–1033.
Page 1026, left column, fourth paragraph, the text “Inhaler devices are many times classified as low- (30 L/min or below), medium– (~30–60 L/min), and high- resistance (>60 L/min) devices” should read “Inhaler devices are many times classified as low- (>60 L/min), medium– (~30–60 L/min), and high-resistance (30L/min or below) devices”.
The authors apologize for this error.