1. National Advisory Unit on Late Effects after Cancer Treatment, Oslo University Hospital, Oslo, Norway;
2. Oslo University, Oslo, Norway;
3. Division of Clinical Oncology, Østfold Hospital Trust, Kalnes, Norway;
4. The Cancer Registry of Norway, Oslo, Norway;
5. The Norwegian Radium Hospital, Department of Pathology, Oslo University Hospital, Oslo, Norway;
6. The Norwegian Institute of Public Health, Bergen, Norway