1. Territorial Ophthalmology Unit, Local Health Authority, Pescara, Italy
2. Department of Chronic Diseases and Health Promotion, World Health Organization, Geneva, Switzerland
3. Eye Clinic and National Centre for Excellence in Ophthalmology, University of Chieti-Pescara, Chieti, Italy
4. Eye Clinic, San Raffaele Hospital, Vita-Salute University, Milan, Italy
5. National Centre for Innovative Technologies in Public Health, Istituto Superiore di Sanità, Rome, Italy
6. Department of Social and Political Sciences, Bocconi University, Milan, Italy
7. Centre for Research in Health and Social Care Management (CERGAS), Government, Health and Non Profit Division, SDA Bocconi, Milan, Italy
8. Chair of Endocrinology and Metabolic Diseases, University of Chieti-Pescara, Chieti, Italy