Funding for this research was provided by:
Public Health Service of Canton Vaud
Article History
Received: 11 June 2018
Accepted: 29 November 2018
First Online: 29 December 2018
Ethics approval and consent to participate
: The study was approved by the Swiss Ethics Committee on research involving human of Lausanne (05 September 2016; N. 2016–01061). No explicit consent was required since the study analysed retrospectively anonymized routinely collected data.
: Not applicable.
: The authors declare that they have no competing interests.
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