Text and Data Mining valid from 2019-04-13
Received: 8 March 2018
Accepted: 3 April 2019
First Online: 13 April 2019
Ethics approval and consent to participate
: The Danish Health and Medicines Authority (#3–3013-197) and The Danish Data Protection Agency (#2008-58-0035) approved this study. Approval from the National Committee on Health Research Ethics was not required accordance to Danish law, as the study was limited to the use of registry data without direct contact with patients. No administrative permissions were required to access data.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.