Funding for this research was provided by:
Text and Data Mining valid from 2018-05-29
Received: 9 December 2017
Accepted: 10 May 2018
First Online: 29 May 2018
Ethics approval and consent to participate
: Approval for this study was obtained from the medical ethical commission of the Erasmus Medical Centre of Rotterdam (MEC 2015–748). Respondents in the internet survey were asked for written consent for participation and publication. Professionals and key informants who were interviewed or who took part in focus group discussions were asked verbal consent for participation and publication. The ethical committee requested written consent for questionnaires of patients only.
: The author(s) declare(s) that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.