The National Spasmodic Dysphonia Association is a non-profit 501c(3) organization dedicated to advancing medical research into the causes of and treatments for Spasmodic Dysphonia, promoting physician and public awareness of the disorder, and providing support for affected persons and their families. It is the only organization that serves the Spasmodic Dysphonia community. Contact Information National Spasmodic Dysphonia Association 300 Park Boulevard, Suite 415 Itasca, IL 60143 Phone: 800-795-6732 Fax: 630-250-4505 NSDA@dysphonia.org