Funding for this research was provided by:
Agence Nationale de Recherches sur le Sida et les Hépatites Virales
Received: 4 October 2018
Accepted: 29 April 2019
First Online: 17 May 2019
Ethics approval and consent to participate
: The ANRS-VESPA2 survey met the ethical requirements of the French National Commission for Computing and Liberties (approval number DR-2010-368) and received approval from the French Advisory Committee on Information Processing in Material Research in the Field of Health. All the participants provided written informed consent.
: The authors declare that they have no competing interests.
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