1 UOSD di Auxologia ed Endocrinologia, AORN Santobono-Pausilipon, Naples, Italy.
2 Pediatric Endocrine Unit, Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy.
3 Centre for Endocrinology, William Harvey Research Institute, Barts & the London School of Medicine & Dentistry, Queen Mary, University of London, London, United Kingdom.