Funding for this research was provided by:
Sjöbring Foundation (Not applicable)
Om Persson Foundation (Not applicable)
Received: 10 June 2019
Accepted: 15 August 2019
First Online: 26 August 2019
Ethics approval and consent to participate
: All procedures were reviewed and approved by the Regional Ethics Board affiliated with Lund University (Etikprövnings: EPN).
: Not applicable.
: The authors declare that they have no competing interests.