1. Tel-Aviv Sourasky Medical Center; Tel-Aviv
2. Department of Pathology; Sackler School of Medicine; Tel-Aviv University; Ramat-Aviv Israel
3. Department of Oral Pathology and Oral Medicine; The Maurice and Gabriela Goldschleger School of Dental Medicine; Tel Aviv University; Tel Aviv Israel
4. Tel-Aviv Sourasky Medical Center; Tel-Aviv and Goldschleger School of Dental Medicine; Tel Aviv University; Tel Aviv Israel
5. Department of Periodontology; Goldschleger School of Dental Medicine; Tel-Aviv University; Ramat-Aviv Israel
6. private dental practice and Biostatistics; Tel-Aviv Israel
7. Schwartz-Arad Day Care Surgical Center; Ramat-Hasharon Israel