1. 1Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
2. 2Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
3. 3Department of Nephrology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
4. 4Department of Neurology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
5. 5Department of Diabetes, Central Clinical School, Monash University, Melbourne, Victoria, Australia
6. 6Department of General Practice and Primary Health Care, University of Helsinki and Helsinki University Hospital, Helsinki, Finland