Funding for this research was provided by:
Forskningsrådet om Hälsa, Arbetsliv och Välfärd (2018-0155)
Received: 17 June 2019
Accepted: 27 June 2019
First Online: 8 July 2019
Ethics approval and consent to participate
: The project has been reviewed by the Regional Ethical Review Board in Stockholm (ref no. 2019-02467 and found not to need any ethical approval. Nevertheless, all participants will be treated in accordance with the ethical guidelines for good research practice. Informed consent will be obtained from all study participants. In the case of refusal, these individuals will not be included in the data set used for analyzes.
: Not applicable.
: The authors declare that they have no competing interests.