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APA Citation
Al-shair, K., Kolsum, U., Berry, P., Smith, J., Caress, A., Singh, D., & Vestbo, J. (2009). development, dimensions, reliability and validity of the novel Manchester COPD fatigue scale. Thorax, 64(11), 950–955. http://access.bl.uk/ark:/81055/vdc_100137792601.0x00002a