[1] Gen Hosp Piraeus Tzannio, Peripheral Med Ctr Poros, Piraeus, Greece
[2] Gen Hosp Athens KAT, Dept Oral & Maxillofacial Surg, Athens, Greece
[3] Univ Portsmouth, Queen Alexandra Hosp, Dept Oral & Maxillofacial Surg, Portsmouth PO1 2UP, Hants, England
[4] Univ Hosp Heraklion, Dept Oral & Maxillofacial Surg, Iraklion, Greece
[5] Univ Athens, Sch Med, Dept Pharmacol, GR-10679 Athens, Greece