Funding for this research was provided by:
Deutsche Gesellschaft für Muskelkranke
Received: 6 March 2019
Accepted: 28 May 2019
First Online: 3 June 2019
Ethics approval and consent to participate
: The study was approved by the institutional ethics committees of Hannover Medical School and the University of Magdeburg and has, therefore, been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.
: All patients provided written informed consent before enrollment.
: The authors declare that they have no competing interests.