Funding for this research was provided by:
Vetenskapsrådet (C820013143, 2015-4870)
Familjen Kamprads Stiftelse (n.a.)
Märit and Hans Raussing Initiative Against Breast Cancer (n.a.)
Received: 14 January 2020
Accepted: 13 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: Each study participant signed a written informed consent form and accepted linkage to national breast cancer registers. The Stockholm ethical review board approved the study (2010/958-31/1).
: Not applicable.
: The authors declare that they have no competing interests.