Zitzelsberger, Tanja
Syha, Roland
Grözinger, Gerd
Partovi, Sasan
Nikolaou, Konstantin
Grosse, Ulrich
Article History
Received: 15 January 2018
Accepted: 25 April 2018
First Online: 2 May 2018
Ethics approval and consent to participate
: The study was approved by the institutional review committee and was in compliance with HIPAA regulations. Due to the retrospective nature of the study, informed consent for retrospective data analysis was waved by the institutional review board.
: There are no conflicts of interest. The authors disclose any financial competing interests but also any non-financial competing interests.
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