Sandvei, Marie S.
Opdahl, Signe
Valla, Marit
Lagiou, Pagona
Vesterfjell, Ellen Veronika
Rise, Tor Vikan
Overrein, Tina Syvertsen
Skjervold, Anette H.
Engstrøm, Monica J.
Bofin, Anna M.
Vatten, Lars J.
Funding for this research was provided by:
Division of Cancer Epidemiology and Genetics, National Cancer Institute (RO1 78761)
Kreftforeningen
Article History
Received: 25 August 2020
Accepted: 12 March 2021
First Online: 23 March 2021
Declarations
:
: The original raw birth size data of the participants were obtained by the corresponding author as part of a cohort study of birth size and breast cancer risk that was conducted and ethically approved in 1997. At the time, we obtained approval for the study, by applying to the Norwegian Data Inspectorate and the Norwegian Directorate of Health. In addition, the study was approved by the Regional Committee for Medical Research Ethics, administered by the Faculty of Medicine, the Norwegian University of Science and Technology in Trondheim, Norway. Legislation for conducting medical research was altered in Norway in 2008, and four regional ethics committees were given authority to approve such research. Thus, the relevant regional committee waivered the need to consent to participate in the follow-up of the current study (requiring linkage to the Norwegian Cancer Registry) and approved the re-analysis of archived diagnostic breast cancer material that enabled us to study molecular subtypes of breast cancer. Thus, the present study was approved by the Regional Committee for Medical and Health Research Ethics (REC Central /IRB: 836/2009), at the Norwegian University of Science and Technology, Trondheim, Norway.
: Not applicable.
: The authors declare that they have no competing interests.