1. Department of Biosciences and Nutrition (S.B., J.K.), Karolinska Institutet, S-141 57 Huddinge, Sweden
2. Department of Medical Genetics (S.B., K.H.-J., J.K.), University of Helinski, 00014 Helinski, Finland
3. Folkhälsan Institute of Genetics (S.B., K.H.-J., J.K.), Biomedicum Helinski, 00014 Helinski, Finland
4. Hospital for Children and Adolescents (J.P., M.L.-N.), University of Helinski, 00029 Helinski, Finland