VD: THE GATHERING CLOUD--1.
D005060:Europe; D006069:Gonorrhea; D006801:Humans; D012698:Serologic Tests; D012749:Sexually Transmitted Diseases; D013223:Statistics as Topic; D013587:Syphilis; D013588:Syphilis Serodiagnosis; D014526:Urethritis
EUROPE; GONORRHEA; SERODIAGNOSIS; STATISTICS; SYPHILIS; SYPHILIS SERODIAGNOSIS; URETHRITIS; VENEREAL DISEASES