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Genetics Home Reference: your guide to understanding genetic conditions About   Site Map   Contact Us
A service of the U.S. National Library of Medicine®

Genetics Home Reference provides consumer-friendly information about the effects of genetic variations on human health.

The resources on this site should not be used as a substitute for professional medical care or advice. Users seeking information about a personal genetic disease, syndrome, or condition should consult with a qualified healthcare professional. See How can I find a genetics professional in my area? in the Handbook.

Published: February 8, 2016