Hamdan, Z., Ahmed, J. and Hamdo, H. 1. Evaluation of the Level of Melatonin, Cortisol and IgA in Saliva of Patients with Oral Lichen Planus Lesions. Journal of Baghdad College of Dentistry. 28, 2 (1), 63-68. DOI:https://doi.org/10.12816/0028223.