1. Comprehensive Cancer Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland;
2. Department of Immunology, Genetics and Pathology University Hospital, Uppsala, Sweden;
3. Department of Oncology, Södersjukhuset, Stocholm, Sweden;
4. Department of Oncology, Gävle Hospital, Sweden;
5. Department of Oncology, Örebro University Hospital, Örebro, Sweden;
6. Department of Oncology, Skåne University Hospital, Malmö, Sweden;
7. Department of Oncology, Odense University Hospital, Odense, Denmark;
8. Department of Oncology, Hospital of South West Jutland, Esbjerg, Denmark;
9. Department of Oncology, Aalborg University Hospital, Aalborg, Denmark;
10. Department of Oncology, Rigshospitalet, Copenhagen, Denmark;
11. Department of Oncology-Pathology, Karolinska Institutet, Breast, Endocrine and Sarcoma Section, Cancer Theme, Karolinska University Hospital, Stockholm, Sweden