1. Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden;
2. Unit of Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden;
3. Division of Cancer Studies, Kings’ College London, London, UK;
4. Department of Surgery, Eskilstuna County Hospital, Eskilstuna, Sweden;
5. Centre for Clinical Research Sörmland, Uppsala University, Eskilstuna, Sweden