1. Department of General, Minimally Invasive and Elderly Surgery, Collegium Medicum, University of Warmia and Mazury, Niepodległosci 44 St., 10-045 Olsztyn, Poland
2. Department of Anesthesiology and Intensive Care, Children’s Memorial Health Institute, Av. Dzieci Polskich 20, 04-730 Warsaw, Poland
3. Department of Neurology, Military Institute of Medicine, Szaserów 128 St., 04-141 Warszawa, Poland
4. Department of Psychology and Sociology of Health and Public Health, School of Public Health, University of Warmia and Mazury in Olsztyn, Warszawska 30 St., 11-041 Olsztyn, Poland