Demographic and clinical features of ALS in northeastern Iran from March 2007 through March 2013; A case series study*

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Declaration of interest

This article is thoroughly the original work of authors and was part of a medical doctorate dissertation. It was supervised and supported by Mashhad University of Medical Sciences, though the authors were independent regarding financial matters. It is strictly ascertained that there would not be any matters of concern as a subject for conflict of interests.