Román, Marta
Hofvind, Solveig
von Euler-Chelpin, My
Castells, Xavier
Article History
Received: 17 May 2018
Revised: 19 November 2018
Accepted: 20 November 2018
First Online: 19 December 2018
<!--Emphasis Type='Bold' removed-->Ethics approval and consent to participate
: Data on screening results in Copenhagen were retrieved from the Copenhagen Mammography Register. Cancer Data on breast cancers were supplied by the Danish Cancer Registry and the Danish Breast Cancer Cooperative Group. Approval for data analysis was granted by the Danish Data Inspection Agency. Data from Norway was provided by the Cancer Registry of Norway. Collection of screening data follows the regulations of the institution and no ethical committee approval was necessary since all data used were anonymised. Screening data from Spain were obtained from the databases of the screening centres. The Review Boards of the institutions that provided data gave approval for data analyses.
: The authors declare no competing interests.
: This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).