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APA Citation
Syed, Q., Bellis, M. A., Beeching, N. J., Tocque, K., Williams, C. S., Jamieson, S., Steele, A., & Davies, P. D. (1996). tuberculin testing in two Liverpool social clubs: the effects of a tuberculosis outbreak on background positivity.. Thorax, 51(6), 624–627. http://access.bl.uk/ark:/81055/vdc_100135156396.0x00001d