1. Thyroid Laboratory (T.D., M.K., G.J.K.), Department of Medicine I, Johannes Gutenberg University Medical Center, 55101 Mainz, Germany
2. Division of Endocrinology (R.S.B., A.H., J.S.), Department of Medicine, Boston Children's Hospital, and Department of Pediatrics, Harvard Medical School, Boston, Massachusetts 02115
3. Department of Pediatrics, Endocrinology, Diabetology, with the Cardiology Division (A. Bossowski), Medical University in Bialystok, 15-089 Bialystok, Poland
4. Department of Pediatrics (M.S.), University La Sapienza, 00185 Rome, Italy
5. Department of Pediatric Endocrinology and Rheumatology (M.N.), University of Medical Sciences, 61-701 Poznan, Poland
6. Institute of Medical Statistics, Biometry, and Epidemiology (J.K.), Johannes Gutenberg University Medical Center, 55101 Mainz, Germany
7. Department of Cardiology (A. Bossowska), Internal Affair and Administration, Ministry Hospital, 15-089 Bialystok, Poland
8. Department of Pediatrics (K.Z.), Silesia Medical University, 40-055 Katowice, Poland
9. Department of Ophthalmology (S.P.), Johannes Gutenberg University Medical Center, 55101 Mainz, Germany