Received: 25 July 2019
Accepted: 11 October 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: The study was approved by the Geneva Regional Ethics Committee (Commission cantonale d’éthique de la recherche de Genève, CCER: 2016–01773, President: Professor Bernard Hirschel) that waived the need for informed consent. Observational data were collected according to international ethics standards conforming to the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.