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APA Citation
George, S., Patel, A., Mackay, A., Singh, R., Sapsford, R., Donaldson, G., & Wedzicha, J. (n.d.). s111 Human rhinovirus infection and exacerbation frequency at COPD exacerbation. Thorax, 68, A58. http://access.bl.uk/ark:/81055/vdc_100135138517.0x000025