BMJ 2007; 335 doi: (Published 30 August 2007) Cite this as: BMJ 2007;335:0-b

In this Clinical Review by Patrick French (BMJ 2007;334:143-7, 20 Jan, doi: 10.1136/bmj.39085.518148.BE), we missed an incongruity in reference 14. The page numbers for reference 14 should have been 1569-72 (not 1587-72). Thus the whole reference is: Johns DR, Tierney M, Felsenstein D. Alteration in the natural history of neurosyphilis by concurrent infection with the human immunodeficiency virus. N Engl J Med 1987;316:1569-72.

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