1. From the Neuromuscular Clinic (M.-E.A., J.M.), Carrefour de Santé de Jonquière, Quebec, Canada; Division of Genetic Counselling (C.P.), Centre de santé et des services sociaux de Chicoutimi, Chicoutimi, Quebec, Canada; Unit of Human Genetics (A.L., C.L., J.P.), Centre Hospitalier de l'Université Laval, Quebec, Canada; and Community Genomic Medicine Center (J.M.), University of Montreal, Montreal, Quebec, Canada.