Exacerbations in non-COPD patients: truth or myth—authors' response. Issue 11 (4th July 2014) - Tan, Wan C; Bourbeau, Jean; Aaron, Shawn; FitzGerald, J Mark; Hernandez, Paul; Cowie, Robert; Chapman, Kenneth R; Marciniuk, Darcy; Maltais, Francois; Buist, Sonia; O'Donnell, Denis; Sin, Don D