Sint, Alena
Baumbach, Sebastian Felix
Böcker, Wolfgang
Kammerlander, Christian
Kanz, Karl-Georg
Braunstein, Mareen
Polzer, Hans
Article History
Received: 19 April 2018
Accepted: 3 December 2018
First Online: 22 December 2018
Ethics approval and consent to participate
: The study was approved by the institutional ethical review board of the University of Munich, Ludwigs-Maximilians-University (782–16). All participants signed written consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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