Undiagnosed chronic obstructive pulmonary disease contributes to the burden of health care use data from the CanCOLD study

Laura E. Labonte, Wan C. Tan, Pei Z. Li, Palmina Mancino, Shawn D. Aaron, Andrea Benedetti, Kenneth R. Chapman, Robert Cowie, J. Mark FitzGerald, Paul Hernandez, François Maltais, Darcy D. Marciniuk, Dennis O'Donnell, Don Sin, Jean Bourbeau