1. Department of Paediatric Ophthalmology and Strabismus, Medical University of Bialystok, ul. Waszyngtona 17, 15-274 Bialystok, Poland
2. Department of Diabetology and Internal Medicine, Medical University of Warsaw, ul. S. Banacha 1A, 02-097 Warsaw, Poland
3. Department of Family Medicine, Medical University of Bialystok, ul Mieszka I 4B, 15-054 Bialystok, Poland
4. Department of Foreign Languages, Medical University of Bialystok, ul. Mickiewicza 2C, 15-222 Bialystok, Poland
5. Faculty of Engineering Management, Bialystok University of Technology, ul. Ojca Tarasiuka 2, 16-001 Kleosin, Poland
6. School of Human Sciences, University of Economics and Human Sciences in Warsaw, ul. Okopowa 59, 01-043 Warsaw, Poland
7. Non-Public Specialist Medical Practice Adrian Wojciech Przystupa, ul. Aleja Józefa Piłsudskiego 31, 17-100 Bielsk Podlaski, Poland