Biering, Karin
Frydenberg, Morten
Pappot, Helle
Hjollund, Niels Henrik
Funding for this research was provided by:
The Danish Cancer Society (R82-A5434-13-S3)
Article History
Received: 11 September 2019
Accepted: 5 March 2020
First Online: 18 May 2020
Ethics approval and consent to participate
: This study was conducted based on approval from the Danish Data Protection Agency journal number #2013-41-2616 and #2012-58-0023 and under their rules of data protection. According to Danish law, approval by the Ethics Committee and written informed consent is not required in questionnaire-based and register-based projects. Additional information is available at The National Committee on Health Research Ethics’ webpage in the “Act on Research Ethics Review of Health Research Projects” § 14,2. available from ExternalRef removed
: All authors have approved the final version of the manuscript and have given consent for publication.
: The authors declare that they have no competing interests.