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Article History

Received: 22 August 2018

Accepted: 16 May 2019

First Online: 27 June 2019

Ethics approval and consent to participate

: No ethics approval was required according to swissethics (Swiss Ethics Committees on research involving humans, Bern), participation was voluntary. Before being presented with the questionnaire, participants were presented with a short standard online-information on the study, use of results, participation being voluntary and their rights, e.g., to withdraw, and they were informed to give consent by clicking to access the online questionnaire.

: non-applicable

: The authors declare they have no competing interests.

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