Williams syndrome is a rare neurodevelopmental disorder caused by a deletion of about 26 genes from the long arm of chromosome 7. It is characterized by mental disability, heart defects and unusual facial features.
This category is for all associations or organizations that promote education, research, and advocacy for patients with Williams Syndrome, their families and caregivers.
If your organization or association is the local chapter of a national group, please do not suggest it here. Your site should be suggested to the appropriate category in Regional.

English-only sites. Information in other languages should be suggested to the appropriate category in World.