Bousabarah, Khaled
Temming, Susanne
Hoevels, Mauritius
Borggrefe, Jan
Baus, Wolfgang W.
Ruess, Daniel
Visser-Vandewalle, Veerle
Ruge, Maximilian
Kocher, Martin http://orcid.org/0000-0002-5674-9227
Treuer, Harald
Article History
Received: 12 July 2018
Accepted: 2 March 2019
First Online: 15 March 2019
Compliance with ethical guidelines
:
: K. Bousabarah, S. Temming, M. Hoevels, J. Borggrefe, W.W. Baus, D. Ruess, V. Visser-Vandewalle, M. Ruge, M. Kocher and H. Treuer declare that they have no competing interests.
: This retrospective study was approved by the Ethics Committee of the Medical Faculty, University of Cologne, protocol number 17-009.