1. Diabetes Unit and Center for Human Genetic Research, Massachusetts General Hospital, Boston, Massachusetts
2. Program in Medical and Population Genetics, Broad Institute of Harvard and MIT, Cambridge, Massachusetts
3. Research Unit of Diabetes and Endocrine Diseases, CSS Scientific Institute, San Giovanni Rotondo, Italy
4. CSS-Mendel Institute, Rome, Italy
5. Unit of Endocrinology, CSS Scientific Institute, San Giovanni Rotondo, Italy
6. Divisions of Genetics and Endocrinology, Children's Hospital Boston, Boston, Massachusetts
7. Department of Genetics, Harvard Medical School, Boston, Massachusetts
8. Department of Clinical Sciences, Sapienza University of Rome, Rome, Italy
9. Department of Medicine, Harvard Medical School, Boston, Massachusetts