1. Department of Plastic and Reconstructive Surgery, 109 Military Hospital, 71-422 Szczecin, Poland
2. Institute of Biology, University of Szczecin, 71-412 Szczecin, Poland
3. Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland
4. Department of Surgery, Pomeranian Medical University, 71-422 Szczecin, Poland