Zubler, Veronika
Mühlemann, Malin
Sutter, Reto
Götschi, Tobias
Müller, Daniel A.
Dietrich, Tobias J.
Pfirrmann, Christian W.
Article History
Received: 14 September 2019
Revised: 12 November 2019
Accepted: 13 November 2019
First Online: 7 January 2020
Compliance with ethical standards
: Institutional Review Board approval was obtained and informed consent was waived in this retrospective study.
: The authors declare that they have no conflicts of interest.