[1] Osped Garibaldi, Div Endocrinol, Lab Anal, I-95123 Catania, Italy
[2] Univ Catania, Sch Med, Dipartimento Med Interna & Med Specialist, Catania, Italy
[3] Osped Cervello, Div Endocrinol, Palermo, Italy
[4] Osped Cervello, Nucl Med Serv, Palermo, Italy
[5] Univ Messina, Sch Med, Sez Endocrinol, Dipartimento Clin Sperimentale Med & Farmacol, Messina, Italy