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Robinson, S; Roberts, T; Barton, P; Bryan, S; Macleod, J; McCarthy, A; Egger, M; Sanford, E; Low, N; Chlamydia, Screening Studies ClaSS Project Group (2007). Healthcare and patient costs of a proactive chlamydia screening programme: the Chlamydia Screening Studies project. Sexually transmitted infections, 83(4), pp. 276-81. London: BMJ Publishing Group 10.1136/sti.2006.023374
