1. Department of Management and Logistics in Health Care, Medical University of Lodz, 90-131 Lodz, Poland
2. Department of Statistics and Medical Informatics, Medical University of Bialystok, 15-089 Bialystok, Poland
3. Department of Psychology, SWPS University of Social Sciences and Humanities, 03-815 Warsaw, Poland
4. Collegium of Management, WSB University in Warsaw, 03-204 Warsaw, Poland