There are several folks that have spasmodic dysphonia (SD/AD, focal
dystonia(s) who have been using Botox for years. Try using Dystonia as a
search word. Also to locate doctors in your area that are fimilar with using
Botox try contacting the Dystonia Medical Research Foundation (DMRF) one of
their webaddresses : [log in to unmask] I hope this helps.