Funding for this research was provided by:
Loterie romande (-none-)
Text and Data Mining valid from 2019-05-04
Received: 31 August 2018
Accepted: 9 April 2019
First Online: 4 May 2019
: Not applicable
: This study was carried out in accordance with the principles enunciated in the current version of the Declaration of Helsinki and the requirements of Swiss law and the Swiss regulatory authority. The <i>Commission Cantonale Valaisanne d’Ethique Médicale</i> (Sion, Switzerland) approved the protocol (protocol ID: 034/12). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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