1. Birmingham and Midland Eye Centre, Birmingham, United Kingdom;
2. Department of Ophthalmology, Faculty of Medicine School of Health Sciences, University of Ioannina, Ioannina, Greece;
3. Department of Obstetrics and Gynecology, Faculty of Medicine School of Health Sciences, University of Ioannina, Ioannina, Greece;
4. First Department of Ophthalmology, General Hospital of Athens G. Gennimatas Medical School, National and Kapodistrian University of Athens, Athens, Greece;
5. Marienhaus Klinikum St. Elisabeth Neuwied, Neuwied, Germany