Text and Data Mining valid from 2018-07-03
Received: 22 December 2017
Accepted: 25 June 2018
First Online: 3 July 2018
Ethics approval and consent to participate
: The study protocols for the 1998 and the 2012 questionnaires were both submitted to the Geneva University Hospital’s Ethics Research Committee and were exempted from a full review by the latter due to the absence of risk they implied for the study populations. The present study is solely based on data extracted from these questionnaires.
: Not applicable
: The authors declare that they have no competing interests.
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