Text and Data Mining valid from 2018-12-01
Received: 8 September 2017
Accepted: 3 December 2018
First Online: 29 December 2018
: The study was approved by the National Bioethical Committee in Iceland (VSNb2008010023/03–1) and reported to the Data Protection Authority (S3695/2008 LSL/). The study was also approved by the professional authorities of the involved health care centres.
: Not applicable.
: None declared.
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