Funding for this research was provided by:
Austrian Ministry of Health (Unrestricted grant)
MS Society Vienna (Unrestricted)
Text and Data Mining valid from 2018-05-23
Received: 19 November 2017
Accepted: 3 May 2018
First Online: 23 May 2018
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Medical University of Vienna (EK1715/2013) and all patients gave written informed consent to participate. The study was conducted under the terms and conditions of the Declaration of Helsinki.
: The authors declare that they have no competing interests.
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