1. Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, 00014 Helsinki, Finland
2. Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Haartmaninkatu 3, Helsinki, 00014 Finland
3. Department of Pathology, University of Helsinki, Haartmaninkatu 3, 00014 Helsinki, Finland
4. Department of Biochemistry and Developmental Biology, University of Helsinki, Haartmaninkatu 3, 00014 Helsinki, Finland