Klinefelter Websites
Association for X and Y Chromosome Variations
- genetic.org
National organization providing information, resources and support for professionals and individuals dealing with Klinefelters, XXY, XYY , Trisomy-X and other SCA conditions.
Klinefelter Syndrome Support Group website
- klinefeltersyndrome.org
Website for Klinefelter Syndrome support
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- xxytalk.com
XXYTalk.com - Discussion Forums and Support for Klinefelter Syndrome, XXY, and Variants