Myotonic Disorders

• University of California Irvine Medical Center; MDA, ALS and Neuromuscular Center — Orange, California, United States
• University of California, Davis — Sacramento, California, United States
• University of Kansas Medical Center — Kansas City, Kansas, United States
• Johns Hopkins Hospital — Baltimore, Maryland, United States

• Groupe de recherche interdisciplinaire sur les maladies neuromusculaires — Saguenay, Quebec, Canada

• Stanford Neurosciences Health Center — Palo Alto, California, United States
• Sleep Medicine Specialists of South Florida — Miami, Florida, United States
• University of Iowa — Iowa City, Iowa, United States
• The Center for Sleep & Wake Disorders — Chevy Chase, Maryland, United States

• Newcastle-upon-Tyne Hospitals NHS Trust — Newcastle upon Tyne, Tyne and Wear, United Kingdom
• University College London Hospitals NHS Foundation Trust, National Hospital for Neurology and Neurosurgery — London, United Kingdom

• Friedrich-Baur-Institute, Dep. of Neurology Klinikum der Universitaet Muenchen Munich, Germany — Munich, Bavaria, Germany

• CHU — Grenoble, France

• Groupe de recherche interdisciplinaire sur les maladies neuromusculaires — Saguenay, Quebec, Canada

Not specified

• University of Rochester Medical Center, Department of Neurology — Rochester, New York, United States

• Congenital Muscle Disease International Registry — Torrance, California, United States