Funding for this research was provided by:
Konung Gustaf V:s och Drottning Victorias Frimurarestiftelse
Stockholms Läns Landsting
Received: 27 September 2019
Accepted: 19 February 2020
First Online: 28 February 2020
Ethics approval and consent to participate
: Written informed consent was obtained from all subjects, and approval was granted from the regional ethical review board, Stockholm, Sweden.
: Not applicable.
: The authors declare that they have no competing interests.