1. Section of Specialized Endocrinology, Oslo University Hospital, and Faculty of Medicine, University of Oslo, Oslo, Norway (M.P., A.H., J.B.)
2. Department of Radiology, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, and Department of Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden (K.L., M.H.)
3. Oslo Centre for Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Oslo, Norway (M.W.F.)
4. Section of Specialized Endocrinology, Oslo University Hospital, Oslo, Norway (K.G.)
5. Clinic of Breast and Endocrine Surgery, Center HOC, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark (C.M.)
6. Department of Endocrinology, Clinic of Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway (S.L.F.)
7. Department of Molecular Medicine and Surgery, Department of Endocrinology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden (Y.P.)
8. Department of Breast and Endocrine Surgery, Haukeland University Hospital, Bergen, Norway (T.A.)
9. Department of Surgery and Centre for Clinical Research of Uppsala University, Västmanland Hospital, Västerås, Sweden (O.H.)
10. Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, Sahlgrenska University Hospital, Gothenburg, Sweden (T.R.)
11. Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden (J.N.)
12. Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden (S.J.).