1. Department of Medical, Surgical, Neurologic, Metabolic and Aging Sciences, University of Campania “L. Vanvitelli” Naples, Naples, Italy
2. Department of Translational Medical Sciences, Federico II University School of Medicine, Naples, Italy
3. Department of Endocrinology Institute of Medicine, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, Gothenburg, Sweden