1. Department of Clinical Sciences and Community Health, University of Milan , 20122 Milan , Italy
2. Graves’ Orbitopathy Center, Endocrinology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico , 20122 Milan , Italy
3. Epidemiology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico , 20122 Milan , Italy
4. Ophthalmology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico , 20122 Milan , Italy