Funding for this research was provided by:
Maastricht University
Article History
Received: 10 March 2020
Accepted: 11 June 2020
First Online: 10 July 2020
Compliance with ethical standards
:
: The authors declare that this manuscript has not been published elsewhere and that it is not under submission for publication elsewhere.
: The authors declare that there is no conflict of interest.
: As this is a review paper, no ethical approval or review is needed for this study.
: The authors of this review have consented to its publication in the <i>Journal of Public Health</i>.