Funding for this research was provided by:
Swedish Federal Government under the LUA/ALF agreement (ALF 20170019)
Swedish Federal Government under the LUA/ALF agreement) (ALFGBG-716801)
Received: 27 February 2019
Accepted: 14 June 2019
First Online: 28 June 2019
Ethics approval and consent to participate
: The study was approved by the Ethics committee of the Karolinska Institutet, Stockholm, Sweden (2005/554–31/3). All study participants provided oral and written consent to participate after given full information about the study.
: Not applicable.
: The authors declare that they have no competing interests.