Funding for this research was provided by:
Gottfried und Julia Bangerter-Rhyner-Stiftung (8472/HEG-DSV)
Text and Data Mining valid from 2018-04-02
Received: 11 October 2017
Accepted: 13 March 2018
First Online: 2 April 2018
Ethics approval and consent to participate
: In compliance with the Swiss Federal Law on data protection, all data were anonymized and de-identified to protect the privacy of patients, physicians and hospitals. As data were routinely collected, retrospective, pre-existing, and de-identified, no informed consent of patients was required and the study was exempted from ethics committee approval in accordance to the Swiss law on human research [CitationRef removed].
: Not applicable.
: SZ, NS, OR, BB, OS, TR and SNJ declare that they have no competing interests or financial disclosures.
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