National network. Founded 1990. Mutual support and networking for families affected by 49XXXXY disorder. Information, pen pals, phone support and newsletter.
Write:
49XXXXY, c/o Elise Watzka
870 Miranda Green
Palo Alto, CA 94306
Voice: 650-941-2408
Website: http://klinefeltersyndrome.org/49er.htm
E-mail: epwatzka@gmail.com
Verified: 7/26/2012