Hägele, Stefan
Müller, Alexander
Nusshag, Christian
Reiser, Jochen
Zeier, Martin
Krautkrämer, Ellen
Article History
Received: 26 April 2018
Accepted: 3 December 2018
First Online: 12 December 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the University Hospital of Heidelberg, Germany, and it adhered to the Declaration of Helsinki. Written informed consent was obtained from the participants.
: The authors declare that they have no competing interests.
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