S.P.
The Williams Syndrome Association is in Troy Michigan.
They can probably answer all your questions,
perhaps also give you some appropriate referrals to follow up.
I've also included a url
so you can read some information on Williams Syndrome.
Williams Syndrome Association
570 Kirts Boulevard Suite 223
Troy Michigan 48084
1-800-806-1871
http://www.williams-syndrome.org/what-is-williams-syndrome
Updated
The Williams Syndrome Association is in Troy Michigan.
They can probably answer all your questions,
perhaps also give you some appropriate referrals to follow up.
I've also included a url
so you can read some information on Williams Syndrome.
Williams Syndrome Association
570 Kirts Boulevard Suite 223
Troy Michigan 48084
1-800-806-1871
http://www.williams-syndrome.org/what-is-williams-syndrome