Accepted for Publication: June 16, 2013.
Published Online: December 9, 2013. doi:10.1001/jamaneurol.2013.3950.
Study concept and design: Hyun, S.-H. Kim, Yoo, Huh, H. J. Kim.
Acquisition of data: Hyun, Hong, H. J. Kim.
Analysis and interpretation of data: Hyun, Hong, H. J. Kim.
Drafting of the manuscript: Hyun, Hong, H. J. Kim.
Critical revision of the manuscript for important intellectual content: Hyun, S.-H. Kim, Yoo, Huh, H. J. Kim.
Administrative, technical, or material support: Hyun, Hong.
Study supervision: S.-H. Kim, Yoo, Hong, Huh, H. J. Kim.
Conflict of Interest Disclosures: Dr H. J. Kim has received honoraria, travel grants, speaker fees, advisory board fees, clinical trial fees, and research grants from Bayer Schering Pharma, Merck Serono, Novartis, Biogen Idec, and Genzyme. No other disclosures were reported.