Redirecting you to http://www.ncbi.nlm.nih.gov/pubmed?term=Tai%20E%2C%20Sanchez%20T%2C%20Lansky%20A%2C%20Mahle%20K%2C%20Heffelfinger%20J%20and%20Workowski%20K.%20Self-reported%20syphilis%20and%20gonorrhoea%20testing%20men%20who%20have%20sex%20with%20men%3A%20national%20HIV%20behavioural%20surveillance%20system%2C%202003-2005