Quisisana Hospital, Ferrara. vdesanctis@libero.it. Department of Pediatrics, Division of Endocrinology, Hamad General Hospital, Doha, Qatar and Department of Pediatrics, Division of Endocrinology, Alexandria University Children's Hospital, Alexandria, Egypt. atsoliman56@gmail.com. Department of Diabetes and Endocrinology, Whittington Hospital, University College London, London, N19 5NF UK. ptzoulis@yahoo.co.uk. Department of Haematology, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Sultanate of Oman. sf.daar@gmail.com. Department of Pediatrics, NYU School of Medicine, New York, NY, USA. bfiscina@yahoo.com. First Department of Paediatrics, National Kapodistrian University of Athens 11527, Greece. christos.kattamis@gmail.com.