Funding for this research was provided by:
Icelandic Centre for Research (903271305, 1203250031, 185359051, 120410021)
Text and Data Mining valid from 2019-08-09
Received: 26 February 2019
Accepted: 25 July 2019
First Online: 9 August 2019
Ethics approval and consent to participate
: Ethics approval granted by the Icelandic National Bioethics committee, approval code VSNb2012020011/03.07. All participants, together with a legal guardian, received information regarding the study protocol, including known risks and benefits, and signed an informed consent statement.
: Not applicable.
: The authors declare that they have no competing interests.