1. Marmara University (S.T., Z.A., T.G., B.H., A.B.), Department of Pediatric Endocrinology, 34899 Istanbul, Turkey
2. Queen Mary University of London (C.H., A.J.L.C., L.A.M.), Centre for Endocrinology, William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, London EC1M 6BQ, United Kingdom