Interviews were transcribed verbatim producing a total of 103 pages of transcripts. We then analyzed their content with the help of the qualitative data analysis computer software NVivo (QSR International). In order to do so, we adopted a deductive–inductive thematic analysis, using the conceptual map as the starting point for the codification, and completing it with emerging themes. Two people independently analyzed the interviews and then compared their codification in order to reach consensus. Interview quotes presented in section 4 were translated into English from French.