1. From the Departments of Cancer Epidemiology and Cancer Prevention, Karolinska Institute, Radiumhemmet, Departments of Molecular Medicine, and Gynaecology and Obstetrics, Karolinska Hospital, Stockholm, Department of Urology, Karolinska Institute, Huddinge University Hospital, Huddinge and Department of Clinical Psychology, Uppsala, Sweden, Department of Statistics, University of Newcastle, Newcastle, Australia, and Icelandic Cancer Society, Reykjavik, Iceland.