1. Centro Dentistico Chisci, Via Ricasoli 18, 58100 Grosseto, Italy
2. Department of Dentistry, University of Milano-Bicocca, 20126 Monza, Italy
3. Department of Ophthalmology, University of Palermo, 90121 Palermo, Italy
4. Department of Ophthalmology, Greifswald University Hospital, 17489 Greifswald, Germany