1 Division of Neurology, Centre intégré universitaire de santé et de services sociaux de l'Estrie - Centre hospitalier universitaire de Sherbrooke, Sherbrooke, Quebec, Canada.
2 Division of Neurology, Department of Medicine, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada.
3 Department of Pediatrics, Division of Medical Genetics, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada.
4 Research Centre on Aging, Sherbrooke, Quebec, Canada.