1. INSERM U836, Grenoble Institut des Neurosciences, Equipe Muscle et Pathologies, Grenoble, France
2. Université Joseph Fourier, Grenoble, France
3. Howard Hughes Medical Institute and Departments of Molecular Physiology and Biophysics, Neurology, and Internal Medicine, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa 52242
4. CHRU de Grenoble, Hopital Michallon, Biochimie et Génétique Moléculaire, Grenoble, France