Retraction Note: BMC Neurol (2019) 19:183

https://doi.org/10.1186/s12883-019-1412-5

The Editor and Publisher have retracted this article [1]. This article was published as the result of a technical error which resulted in two versions [1, 2] of the same article being published. [2] is the final version of the article. Springer Nature apologises to the authors and to readers for the inconvenience caused. All authors agree with this retraction.