Kunisaki, K M, Dransfield, M T, Anderson, J A, Brook, R D, Calverley, P M A, Celli, B, Crim, C, Hartley, B F, Martinez, F J, Newby, D E, Pragman, A A, Vestbo, J, Yates, J C & Niewoehner, D 2018, ' Exacerbations of Chronic Obstructive Pulmonary Disease and Cardiac Events: A Cohort Analysis ', American Journal of Respiratory and Critical Care Medicine, vol. 198, no. 1 . https://doi.org/10.1164/rccm.201711-2239OC Kunisaki, K M, Dransfield, M T, Anderson, J A, Brook, R D, Calverley, P M A, Celli, B R, Crim, C, Hartley, B F, Martinez, F J, Newby, D E, Pragman, A A, Vestbo, J & Yates, J C & Niewoehner, D E 2018, ' Exacerbations of Chronic Obstructive Pulmonary Disease and Cardiac Events : A Cohort Analysis ', American Journal of Respiratory and Critical Care Medicine . https://doi.org/10.1164/rccm.201711-2239OC