5CHES SON HW,ZAIDIAA,ARAL SO.Decreasing age disparities in syphilis and gonorrhea incidence rates in the United States,1981-2005[J].Sex Transm Dis,2008,35(4):398-399.
6GOTTLIEB SL,POPE V,STERNBERG MR,et al.Prevalence of syphilis seroreactivity in the United States:data from the National Health and Nutrition Examina tion Surveys (NHANES) 2001-2004[J].Sex Transm Dis,2008,35(5):507-511.
