Accepted for Publication: April 19, 2013.
Published Online: November 11, 2013. doi:10.1001/jamaneurol.2013.3209.
Study concept and design: Witting, Vissing.
Acquisition of data: Witting, Duno, Vissing.
Analysis and interpretation of data: Witting, Duno, Piraud, Vissing.
Drafting of the manuscript: Witting.
Critical revision of the manuscript for important intellectual content: Witting, Duno, Piraud, Vissing.
Administrative, technical, or material support: Witting, Duno.
Conflict of Interest Disclosures: Dr Vissing has received research support, honoraria, and travel funding from Genzyme Corporation and is a member of the Global Advisory Board for Pompe Disease for Genzyme Corporation. Dr Vissing has also worked as a consultant/advisor for Lundbeck and as a drug safety consultant for Cardoz AB. No other disclosures were reported.