Kattan, Michael W.
Gerds, Thomas A.
Article History
Received: 10 November 2017
Accepted: 24 April 2018
First Online: 4 May 2018
Ethics approval and consent to participate
: Patient data were registered prospectively in a database approved by the Danish Data Protection Agency (file 2006-41-6256). The Committees on Health Research Ethics in the Capital Region of Denmark approved the study (H-2-2012-134).
: The authors declare that they have no competing interests.
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