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Article History

Received: 19 April 2017

Accepted: 24 January 2018

First Online: 7 February 2018

Ethics approval and consent to participate

: The study obtained the approval of the Swiss ethical review board, “Commission cantonale Vaud d’éthique et de recherche sur l’être humain” (Reference CER-VD 410/11).In accordance with the Ethics Committee and to the extent that no biomedical data were collected, the physicians and the patients only provided their informed oral consent for their participation.

: Not applicable.

: The authors declare that they have no competing interests.

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