1. Department of Oral and Maxillofacial Surgery, The Chaim Sheba Medical Center, Tel Hashomer, Israel;
2. Cancer Research Center, The Chaim Sheba Medical Center, Tel-Hashomer, Israel;
3. Institute of Pathology, Rabin Medical Centre, Beilinson Campus, Petah-Tiqva, Israel; and
4. Department of Oral Pathology and Oral Medicine, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel