1. Department of Medicine, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
2. Department of Human Genetics, the Department of Microbiology, Immunology and Molecular Genetics, and the Department of Medicine, University of California, Los Angeles, Los Angeles, California
3. Computational Medicine Research Group, Institute of Clinical Medicine, University of Oulu and Biocenter Oulu, Oulu, Finland
4. Nuclear Magnetic Resonance Metabonomics Laboratory, Laboratory of Chemistry, Department of Biosciences, University of Eastern Finland, Kuopio, Finland
5. Departments of Medicine and Clinical Nutrition, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
6. National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
7. Center for Statistical Genetics, Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, Michigan
8. Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
9. Department of Internal Medicine and Biocenter Oulu, Clinical Research Center, University of Oulu, Oulu, Finland.