1. Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
2. Department of Medicine (Clinical Epidemiology Unit), Karolinska Institutet, Stockholm, Sweden
3. Cancer Epidemiology Unit, Center for Experimental Research and Medical Studies, and Center for Oncologic Prevention Piemonte, University of Turin, Turin, Italy
4. Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden