Čelar, Aleš
Tafaj, Ekrem
Graf, Alexandra
Lettner, Stefan
Funding for this research was provided by:
Medical University of Vienna
Article History
Received: 30 March 2017
Accepted: 25 March 2018
First Online: 17 May 2018
Conflict of interest
: A. Čelar, E. Tafaj, A. Graf and S. Lettner declare that they have no competing interests.
: This contribution depicts a retrospective investigation which does not interfere with therapy. It was approved by the ethical board of the Medical University of Vienna, Austria.