[1] Univ Catania, Dept Biomed & Biotechnol Sci, Catania, Italy
[2] Univ G dAnnunzio, Sch Med, Chieti, Italy
[3] Univ Catania, Dept Clin & Expt Med, Endocrine Unit, Garibaldi Nesima Hosp, Catania, Italy
[4] Univ Milan, Sch Med, Milan, Italy
[5] George Washington Univ Hosp, Dept Neurol, Washington, DC USA