Table 1.

The entire list used in the search and the combinations used in the research phase.

Search Topic
1	OR 2	OR 3	AND 4
			AND 5
			AND 6
			AND 7
			AND 8
			AND 9
			AND 10

1. Oral lichen planus; 2. lichen planus; 3. OLP; 4. human papillomavirus; 5. HSV 1; 6. herpes simplex virus 1; 7. EBV; 8. Epstein–Barr virus; 9. cytomegalovirus; 10. CMV.