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APA Citation
Sundh, J., Ställberg, B., Lisspers, K., Kämpe, M., Janson, C., & Montgomery, S. (2016). comparison of the COPD Assessment Test (CAT) and the Clinical COPD Questionnaire (CCQ) in a Clinical Population. COPD, 13, 57–65. http://access.bl.uk/ark:/81055/vdc_100057750792.0x000010