3Centers for Disease Control and prevention(CDC).Azithromycin treatment failures in syphilis infections-San Francisco.California,2002-2003[J].MMWR Morb Mortal wkly Rep,2004,53(9):197.
4Cheng S,French P.Unilateral penile swelling:all unusual presentation of primary syphilis[J].International Journal of STD&AIDS.2008,19:640-641.