Text and Data Mining valid from 2019-07-31
Received: 27 April 2019
Accepted: 17 July 2019
First Online: 31 July 2019
Ethics approval and consent to participate
: The regional ethics committee (REC) was informed about the study and deemed the study a clinical quality study not needing formal REC approval (reference number 2017/842/REC Central). The study received institutional approval (reference number ESA 17/5481) and approval by the Norwegian Centre for Research Data (reference number 55283/dated 12 October 2017). All institutional bodies waived the need for patient consent.
: Not applicable
: The authors declare that they have no competing interests.