1 Maxillofacial Unit, University Hospital of Larissa, Greece. Electronic address: steliosdoumas@hotmail.com.
2 Maxillofacial Unit, University Hospital of Larissa, Greece.
3 Maxillofacial Unit, Queen Victoria Hospital NHS Trust, East Grinstead, UK; Maxillofacial Unit, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK.
4 Maxillofacial Unit, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK.
5 ENT Clinic, University Hospital of Larissa, Greece.