Trisomy 21 (Down Syndrome) Clinics

 The Children's Hosptial of Philadelphia -  Trisomy 21 Program

http://www.chop.edu/service/trisomy-21/home.html?id=76670

From their site:

Established in 2003, the Trisomy 21 Program at The Children's Hospital of Philadelphia assesses the developmental, behavioral and health needs of children and young adults with Trisomy 21 (Down syndrome)...