1. Division of Cancer Studies; Cancer Epidemiology Group; School of Medicine; King's College London; London UK
2. Regional Cancer Centre; Uppsala Örebro; Uppsala Sweden
3. CLINTEC Department; Karolinska Institutet; Stockholm Sweden
4. Clinical Epidemiology Unit; Department of Medicine (Solna); Karolinska Institute; Stockholm Sweden
5. Department of Surgical Sciences; Uppsala University; Uppsala Sweden
6. Department of Surgical and Perioperative Sciences, Urology and Andrology; Umeå University; Umeå Sweden