Received: 5 April 2018
Accepted: 6 November 2018
First Online: 7 December 2018
Ethics approval and consent to participate
: The study was approved by the Danish Data Protection Agency (ref. 2007-58-0015, int. ref. GEH-2014-018). As a retrospective registry-based study, Danish law does not require ethical approval [CitationRef removed]. The chart review for the validation process was approved by the Danish Patient Safety Authority and the permission was granted based on the assumption that only physicians at a given department reviewed its own patients’ charts.
: Not applicable.
: The authors declare that they have no competing interests.
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