1. Department of Ophthalmology, The Medical Centre of Postgraduate Education, Warsaw, Poland
2. Department of Ophthalmology, City Hospital in Poznań, Poland
3. Department of Professional Training in Clinical Chemistry, Silesian Piasts University of Medicine in Wroclaw, Poland
4. Department of Ophthalmology, Silesian Piasts University of Medicine in Wroclaw, Poland
E‐mail: