Bælum, Jens Kristian http://orcid.org/0000-0003-0135-2430
Rasmussen, Lars
Qvist, Niels
Ellebæk, Mark Bremholm
Article History
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.
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