Text and Data Mining valid from 2019-04-25
Received: 23 November 2018
Accepted: 4 April 2019
First Online: 25 April 2019
Ethics approval and consent to participate
: The study was approved by the local ethic committee and was performed as a part of departmental quality control (EKOS (Ethikkommission Ostschweiz), BASEC (Business Administration System for Ethics Committees) number 2018–00104). Research adhered to the tenets of the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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