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APA Citation
Khalid, S., Dockry, R., Holt, K., Sumner, H., Valdramidou, D., Birrell, M. A., Belvisi, M. G., Woodcock, A., & Smith, J. A. (n.d.). s139 Cough responses to tussive agents in health and disease. Thorax, 66, A64. http://access.bl.uk/ark:/81055/vdc_100144709996.0x000035