1. Department of Ophthalmology, Medical Academy, Lithuanian University of Health Sciences, 44037 Kaunas, Lithuania
2. Department of Ophthalmology, Hospital of Lithuanian University of Health Sciences, Kaunas Clinics, 50161 Kaunas, Lithuania
3. Department of Ophthalmology, University of Warmia and Mazury, 10-724 Olsztyn, Poland
4. Institute for Research in Ophthalmology, 60-554 Poznan, Poland