1. Department of Maxillofacial Surgery, Medical University of Lodz, 113 Żeromskiego Str., 90-549 Lodz, Poland
2. Department of Oral Surgery, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland
3. 4th Military Clinical Hospital in Wroclaw, ul. Rudolfa Weigla 5, 50-981 Wroclaw, Poland
4. Department of Maxillofacial Surgery, Hospital of the Ministry of Interior, Wojska Polskiego 51, 25-375 Kielce, Poland
5. Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland
6. Department of Maxillofacial Surgery, Medical University of Gdansk, 80-210 Gdańsk, Poland