* تشجنات عضلية* Spasmodic Disphonia Online Community (VoiceMatters.net)* American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS)* American Speech-Language-Hearing Association (ASHA)* National Spasmodic Dysphonia Association, Inc. (NSDA)* American Academy of Neurology* Worldwide Education and Awareness for Movement Disorders (WE MOVE)* Spasmodic Dysphonia section of VoiceInfo.org* Dystonia Society Network Group – for sufferers and carers to share experiences* Society for the Management of Spasmodic Dysphonia