Genetic Org Home
- http://www.genetic.org/
- Information about Klinefelter Syndrome, when it was first discovered, the common characteristics, and treatment.
Yahoo!: XXYList
- http://groups.yahoo.com/group/xxylist
- XXY is a genetic anomaly which occurs 1 in 500 in the general population today. Men with this condition usually have Klinefelters Syndrome. Offers joining instructions for this support group.