Received: 2 October 2017
Accepted: 25 January 2019
First Online: 1 February 2019
Ethics approval and consent to participate
: The study protocol was approved both by the National Bioethics Committee of Iceland (NBC; Reference No. VSNb2010050008) and the Icelandic Data Protection Authority (DPA; Reference No. S5680). According to Icelandic legislation (Act on the Protection of Privacy as regards the Processing of Personal Data, No. 77/2000) neither epidemiologic research nor the use of anonymous data generated from clinical service in scientific research projects require individual consent if the study protocol is approved by NBC and DPA, see further ExternalRef removed.
: Not applicable.
: Authors BG and BRL are shareholders in Expeda. Other authors declare no conflict of interest.
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