1. Department of Ophthalmology Medical University of Warsaw Warsaw Poland
2. Department of Ophthalmology Medical Centre for Postgraduate Education Warsaw Poland
3. Department of Eye Diseases Medical University of Lodz Lodz Poland
4. Department of Ophthalmology, School of Medicine in Katowice Medical University of Silesia Katowice Poland
5. Department of Ophthalmology, Medical University of Lodz University Hospital No 1 Lodz Poland
6. Department of Ophthalmology and Ocular Oncology Jagiellonian University Medical College Cracow Poland