1. STUDENT RESEARCH GROUP AT THE CHAIR AND DEPARTMENT OF PATHOMORPHOLOGY FACULTY OF MEDICAL SCIENCES IN ZABRZE, ZABRZE, POLAND
2. HOSPITAL EMERGENCY DEPARTMENT, ST. JOHN PAUL II MAZOVIA REGIONAL HOSPITAL IN SIEDLCE, POLAND
3. CHAIR AND DEPARTMENT OF PATHOMORPHOLOGY, FACULTY OF MEDICAL SCIENCES IN ZABRZE MEDICAL UNIVERSITY OF SILESIA, ZABRZE, POLAND
4. RADIX, NON-PUBLIC HEALTHCARE FACULTY, ZAWIERCIE, POLAND