1. PRAXIX DR. PETERSEIL&UGLUE, HILDESHEIM, GERMANY
2. FACULTY OF EDUCATION, KAZIMIERA MILANOWSKA COLLEGE OF EDUCATION AND THERAPY IN POZNAN, POZNAN, POLAND; MEDICAL AFFAIRS DEPARTMENT, PHYTOPHARM KLĘKA SA, KLĘKA, POLAND
3. INSTITUTE OF MATERIALS RESEARCH AND QUANTUM ENGINEERING, POZNAN, UNIVERSITY OF TECHNOLOGY, POZNAN, POLAND
4. DEPARTMENT OF FOOD AND NUTRITION AT THE PRESIDENT S. WOJCIECHOWSKI MEMORIAL CALISIA UNIVERSITY, KALISZ, POLAND
5. INSTITUTE OF PREVENTIVE RESEARCH, PRESIDENT S. WOJCIECHOWSKI MEMORIAL CALISIA UNIVERSITY, KALISZ, POLAND