1. Departments of Internal Medicine (A.A.v.M., W.E.V., T.J.V., R.P.P.),3000 CA Rotterdam, The Netherlands;
2. Department of Pediatrics, Division of Endocrinology (D.C., A.E.), 26500 Patras, Greece;
3. Department of Neurology (E.C.), University of Patras Medical School, 26500 Patras, Greece;
4. Department of Endocrinology (A.T.), University of Ioannina, 45110 Ioannina, Greece
5. Clinical Chemistry (Y.B.d.R.), Erasmus University Medical Center, 3000 CA Rotterdam, The Netherlands;