Accepted for Publication: March 6, 2015.
Published Online: May 11, 2015. doi:10.1001/jamaneurol.2015.0475.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Thawani, Lebwohl, Ludvigsson.
Obtained funding: Ludvigsson.
Administrative, technical, or material support: Brannagan, Ludvigsson.
Study supervision: Brannagan, Ludvigsson.
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Lebwohl reported receiving grant UL1 TR000040 from The National Center for Advancing Translational Sciences, National Institutes of Health. Dr Ludvigsson reported receiving grants from the Swedish Society of Medicine and the Swedish Research Council.
Role of the 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.