Alstrom Syndrome International
American Heart Association
Barth Syndrome Foundation
Children's Cardiomyopathy Foundation
Congenital Health Information Network
Friedreich Ataxia
Global Cardiology Internet Links (en Español)
HCM Association
HCM Program
INTERNAF
Johns Hopkins Cardiomyopathy Service
National Ataxia Foundation Home Page
United Mitochondrial Disease Foundation