Siebert, Eberhard http://orcid.org/0000-0001-7395-6546
Bohner, Georg
Zweynert, Sarah
Maus, Volker
Mpotsaris, Anastasios
Liebig, Thomas
Kabbasch, Christoph
Article History
Received: 18 November 2017
Accepted: 19 March 2018
First Online: 12 April 2018
Compliance with ethical guidelines
:
: E. Siebert, G. Bohner, S. Zweynert, V. Maus, A. Mpotsaris, T. Liebig and C. Kabbasch declare that they have no competing interests.
: The study was approved by the institutional ethics committee in Berlin. According to the guidelines of the local ethics committee in Cologne, no approval was necessary for conducting this retrospective, observational study.