1 Division of Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Sweden; Department of Oncology and Pathology, Division of Clinical Cancer Epidemiology, Karolinska Institutet, Stockholm, Sweden. Electronic address: Gunnar.Steineck@gu.se.
2 Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Department of Pelvic Cancer, Karolinska University Hospital, Sweden.
3 Department of Surgical Sciences, Uppsala University Hospital, Uppsala, Sweden.