1 Department of Clinical Epidemiology, Department of Clinical Medicine, Aarhus University and Aarhus University Hospital, Olof Palmes Allé 43-45, 8200, Aarhus, N, Denmark. cfh@clin.au.dk.
2 Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, J.B. Winsløvs Vej 4, 5000, Odense, Denmark.
3 Department of Clinical Research, University of Southern Denmark, Winsløwparken 19, 5000, Odense, Denmark.
4 Danish Breast Cancer Group, Blegdamsvej 9, 2100, Copenhagen, Denmark.
5 Department of Oncology, University of Copenhagen, Blegdamsvej 9, Rigshospitalet, 2100, Copenhagen, Denmark.
6 Department of Clinical Epidemiology, Department of Clinical Medicine, Aarhus University and Aarhus University Hospital, Olof Palmes Allé 43-45, 8200, Aarhus, N, Denmark.
7 Department of Epidemiology, Rollins School of Public Health, Emory University, 1518 Clifton Rd, Atlanta, GA, 30322, USA.