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Article History

Received: 10 April 2021

Accepted: 21 October 2021

First Online: 16 November 2021

Change Date: 2 March 2022

Change Type: Clarification

Change Details: Editors Note: The Senior Editor is currently investigating this article as concerns have been raised about the methodology of the clinical trial reported. Further editorial action may be taken as appropriate once the investigation into the concerns is complete and all parties have been given an opportunity to respond in full.

Change Date: 11 August 2022

Change Type: Clarification

Change Details: Editor's Note: Based on the explanation provided by the authors, the Senior Editor concluded that no further editorial action is needed.

Declarations

:

: This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by Regional Ethical Committee of South-East Norway (Approval no. 143984). Written informed consent was obtained from all individual participants included in the study.

: Not applicable.

: Dr. Lise M. Helsingen reports grants from Norwegian Research Council (grant no. 312757), during the conduct of the study. Dr. Frederik E. Juul reports grants and personal fees from Regional Health Trust of South-East Norway, outside the submitted work. Dr. Yuichi Mori reports personal fees from Olympus Corp., grants from Japan Society for the Promotion of Science, outside the submitted work. Prof. Michael Bretthauer and Prof. Mette Kalager reports non-financial support from Guideline committee memberships for different professional organizations in colorectal cancer screening, grants and non-financial support from Research grants for clinical trials and epidemiology from various academic and public funders (to employer), outside the submitted work. All other authors declare no competing interests.