Ebert, Nicola
Rupprecht, Martin
Stuecker, Ralf
Breyer, Sandra
Stiel, Norbert
Priemel, Matthias H.
Spiro, Alexander S.
Article History
Received: 26 July 2019
Accepted: 24 October 2019
First Online: 8 November 2019
Ethics approval and consent to participate
: This is a retrospective study. Ethics approval is not necessary.
: Not applicable.
: The authors declare that they have no competing interests.