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American Social Health Association
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Centres for Disease Control, National Center for HIV, STD and TB Prevention Division of Sexually Transmitted Diseases
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The Journal of the Americal Medical Association, STD Information Centre
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Duke University Student Health service
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AIDS Education Global Information System
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Joint UN Programme on HIV/AIDS
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WHO Department of HIV/AIDS
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The Naked Truth about STDs
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International Union Against Sexually-transmitted Infections
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The Alan Guttmacher Institute - STD and HIV
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Action for AIDS Singapore
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National Skin Centre Singapore
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British Association of Sexual Health and HIV (BASHH)
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Ministry of Health: Statistics
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Survey and questionnaire by Melbourne Sexual Health Centre for checking your risk of contracting STIs
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Eros Coaching
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