1. Department of Food Science, Swedish University of Agriculture Science, SE-75007 Uppsala, Sweden
2. Department of Urology, University Hospital, SE-701 85 Örebro, Sweden
3. Nutrition Research, Department of Public Health and Clinical Medicine, University of Umeå, SE-90187 Umeå, Sweden
4. Department of Clinical Chemistry, Helsinki University Central Hospital, Biomedicum, PB 700, FIN-00029, Helsinki, Finland
5. Institute for Preventive Medicine, Nutrition, and Cancer Folkhälsan Research Center, Biomedicum Helsinki, FIN-00014 University of Helsinki, Helsinki, Finland