Text and Data Mining valid from 2020-05-06
Received: 13 February 2020
Accepted: 27 April 2020
First Online: 6 May 2020
Ethics approval and consent to participate
: The study used anonymized patient data, collected by local and national approved health registries according to The Norwegian Health Research Act. The regional ethical committee (Reference number: REC Central Norway 2016/2169) categorized this as a quality improvement project. The local health trusts gave institutional approval.
: Not applicable.
: The authors declare that they have no competing interests or disclosures.