Nonnenmühlen, Nicola
Burnic, A.
Bartella, A.
Lethaus, B.
Gerhards, F.
Ristow, O.
Pautke, C.
Hölzle, F.
Steiner, T.
Article History
Received: 26 June 2017
Accepted: 12 April 2018
First Online: 22 April 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study does not include any personal information of patients.
: For this type of study formal consent is not required.