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Starkey F, Moore L, Campbell R, Sidaway M, Bloor M; ASSIST.Starkey F, et al. Among authors: campbell r.BMC Public Health. 2005 Apr 22;5:43. doi: 10.1186/1471-2458-5-43.BMC Public Health. 2005.PMID: 15847695Free PMC article.
Campbell R, Mills N, Sanford E, Graham A, Low N, Peters TJ; Chlamydia Screening Studies (ClaSS) Group.Campbell R, et al.BMC Public Health. 2006 Apr 25;6:106. doi: 10.1186/1471-2458-6-106.BMC Public Health. 2006.PMID: 16638147Free PMC article.