1. Collegium Medicum, Jan Kochanowski University, 25-317 Kielce, Poland
2. 1st Clinic of Cardiology and Electrotherapy, Swietokrzyskie Cardiology Centre, 25-736 Kielce, Poland
3. Ophthalmology Clinic, Voivodeship Regional Hospital, 25-736 Kielce, Poland