1 Program of Pediatric Endocrinology, Pediatric Unit, Department of Medical and Surgical Sciences; Azienda Policlinico S. Orsola Malpighi, University of Bologna, Bologna, Italy.
2 Medical Genetics Department, Erciyes University, Kayseri, Turkey.
3 Division of Pediatric Endocrinology, Department of Pediatrics, University Hospital, Schleswig-Holstein, Campus Kiel, Kiel, Germany.
4 Biochemical Institute, Christian-Albrecht University of Kiel, Kiel, Germany.
5 Endocrinology Unit-Department of Medical and Surgical Sciences, Center for Applied Biomedical Research (CRBA), Bologna, Italy.
6 Program of Pediatric Endocrinology, Pediatric Unit, Department of Medical and Surgical Sciences; Azienda Policlinico S. Orsola Malpighi, University of Bologna, Bologna, Italy. antonio.balsamo@unibo.it.