Development of a COPD exacerbation tool (CERT) - Video abstract [ID 337644] Video abstract of an original research "The development of a COPD exacerbation tool (CERT) to help patients recognize when to seek medical advice" published in the open access International Journal of Chronic Obstructive Pulmonary Disease by Paul W Jones, Chanzheng Wang, Ping Chen et al. Read the Article Contributed by: Dove Press
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