Funding for this research was provided by:
Received: 16 November 2018
Accepted: 20 November 2019
First Online: 11 December 2019
Ethics approval and consent to participate
: The Regional Ethical Board in Stockholm (dr. nr. 2017/984–31/5) has approved the proposed study. The study complies fully with current ethical requirements regarding the handling and storage of personal data and regarding the informed consent process in accordance with Sweden’s Personal Data Act and Secrecy Act. Participants provide written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.