Article History
Received: 9 August 2019
Accepted: 6 January 2020
First Online: 1 February 2020
Ethics approval and consent to participate
: The study was approved by the Swedish Ethical Review Authority, local Ethics Committee of Stockholm (D.nr 2017/143–32).
: Not applicable.
: The authors declare that they have no competing interests. No benefits of any kind have been received or will be received for personal or professional use from a commercial party related directly or indirectly to the article. Thus, no financial or other relationships exist that might lead to a conflict of interests.