Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (PMPDP3_145471)
Bundesamt für Gesundheit (N.A.)
Received: 29 January 2019
Accepted: 4 July 2019
First Online: 22 July 2019
Ethics approval and consent to participate
: Informed consent was obtained from all participants with clearly stated objectives of the research. The participants were also assured of the anonymity and confidentiality of the information and were informed of their right to participate or refuse participation. The Ethical Board of the canton of Geneva approved the study (CER 14–095). The datasets generated during and/or analysed during the current study are not publicly available due to the sensitivity of the data.
: Not applicable.
: The authors declare that they have no competing interests.