Accepted for Publication: May 1, 2014.
Published Online: September 29, 2014. doi:10.1001/jamaneurol.2014.1432.
Study concept and design: Agrawal, Beggs.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Agrawal, Joshi, Marinakis, Ciarlini, Chad, Beggs.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Schmitz-Abe, Markianos.
Obtained funding: Beggs.
Administrative, technical, or material support: Agrawal, Beggs.
Study supervision: Agrawal, Beggs.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grants K08 AR055072 (Dr Agrawal) and R01 AR044345 (Dr Beggs) from the National Institute of Arthritis and Musculoskeletal and Skin Diseases of the National Institutes of Health, by grant MDA201302 from the Muscular Dystrophy Association (Dr Beggs), and by the Jean-Pierre and Nancy Boespflug Myopathic Research Foundation.
Role of Funder/Sponsor: The funding sources 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 members of this unique family, whose active participation made this study possible.