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Article History

Received: 23 April 2017

Accepted: 16 January 2018

First Online: 13 February 2018

Ethics approval and consent to participate

: The Swiss Federal act on Research involving Human Beings –Articles 3, 4, 7, 11 and 16 regulates the obligation for clearance by a regional ethics committee []. According to the above mentioned legislation, surveys which do not ask for personal data including personal health data and are analysed anonymously do not require clearance by the ethics committee.However, interviewees agreed to participate in the study signing a written form stating that all given information is confidential and will only be published in an anonymised fashion.Attached to the questionnaire all participants obtained a signed form stating that participation in the questionnaire study is voluntary and all given information is confidential and will only be published in an anonymised fashion.

: With returning the completed questionnaire the participants agreed with anonymised publication of the given information.

: The authors declare that they do not have any competing interests.

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