Accepted for Publication: December 26, 2013.
Published Online: February 24, 2014. doi:10.1001/jamaneurol.2013.6337.
Study concept and design: Cadieux-Dion, Turcotte-Gauthier, Rouleau, Cossette.
Acquisition of data: Cadieux-Dion, Turcotte-Gauthier, Noreau, Martin, Meloche, Gravel, Drouin, Nguyen.
Analysis and interpretation of data: Cadieux-Dion, Turcotte-Gauthier, Martin, Drouin, Nguyen.
Drafting of the manuscript: Cadieux-Dion, Turcotte-Gauthier, Nguyen, Cossette.
Critical revision of the manuscript for important intellectual content: Noreau, Martin, Meloche, Gravel, Drouin, Rouleau.
Obtained funding: Rouleau, Cossette.
Administrative, technical, or material support: Meloche, Gravel.
Study supervision: Nguyen, Cossette.
Conflict of Interest Disclosures: None reported.
Funding/Support: Mr Cadieux-Dion is supported by the Réseau de Médecine Génétique Appliquée and La Fondation GO. Ms Martin and Dr Nguyen are supported by the Fonds de Recherche du Québec–Santé. Drs Rouleau and Cossette are supported by the Canadian Institutes of Health Research. Ms Noreau received the Doctoral Award–Frederick Banting and Charles Best Graduate Scholarship from the Canadian Institutes of Health Research.
Role of the Sponsor: The sponsors had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: We thank the FC family for their participation in the study. Yves Léo Lamarre, MD, Department of Neurology, Notre Dame Hospital, Montreal, reviewed all nerve conduction studies and electromyographic recordings.