Funding for this research was provided by:
Medical University of Vienna
Text and Data Mining valid from 2018-08-06
Received: 29 January 2018
Accepted: 21 June 2018
First Online: 6 August 2018
Conflict of interest
: S. Langer, C. Radtke, E. Györi, A. Springer and M.L. Metzelder declare that they have no competing interests.