1. Chair and Department of Dental Surgery, Poznan University of Medical Sciences, Poznan, Poland
2. Chair of Cardiology, Laboratory of Cardiomorphology, Poznan University of Medical Sciences, Poznan, Poland
3. Chair of Cardio-Thoracosurgery, Poznan University of Medical Sciences, Poznan, Poland
4. Chair of Microbiology, University of Medicine, Wroclaw, Poland
5. Chair of Prosthodontics, Poznan University of Medical Sciences, Poznan, Poland
6. of Public Health, Chair of Social Medicine, Poznan University of Medical Sciences, Poznan, Poland