1. Department of Community Medicine and Rehabilitation Geriatric Medicine, Umeå University Hospital, S-901 87 Umeå, Sweden
2. University of Turku, Functional Foods Forum and Institute of Biomedicine, University of Turku, FI-20014 Turku, Finland
3. Department of Public Health and Clinical Medicine, Nutritional Research, Umeå University, S-901 87 Umeå, Sweden
4. Department of Medical Biosciences, Pathology, Umeå University Hospital, S-901 87 Umeå, Sweden
5. Department of Oncology, Umeå University Hospital, S-901 87 Umeå, Sweden
6. Department of Clinical Chemistry, Institute for Preventive Medicine, Nutrition and Cancer, Folkhälsan Research Center, and University of Helsinki, FI-00014 Helsinki, Finland