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Article History

Received: 7 November 2018

Accepted: 12 April 2019

First Online: 8 May 2019

Ethics approval and consent to participate

: The ethics committee of the canton Berne registered the study as a quality evaluation study under No. 197/15 and waived the requirement for informed patient consent. All patients provided a general consent for the use of their data according to Swiss law.

: Not applicable.

: All authors have completed the ICMJE uniform disclosure form at ExternalRef removed . WEH reports grant money from the director of research at Inselspital University Hospital Berne and grants from Mittelbauvereinigung of the University of Berne during the conduct of the study; personal fees from AO Foundation Zurich and other from Mundipharma Medical Basel, outside the submitted work. SCH reports grants from Mittelbauvereinigung of the University of Berne, during the conduct of the study and personal fees from AO Foundation Zurich, outside the submitted work. TCS reports grants from Bangerter-Rhyner-Foundation, grants from Boehringer-Ingelheim, grants and personal fees from Bayer, grants from Daiichi-Sankyo and grants from Bristol-Myers Squibb, outside the submitted work.

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