Ahmadi, Y., Tonkaboni, A., Sargaran, K., Mohammadnia, A., Eghbali-Zarch, R. and Shamshiri, A.R. 2018. Evaluation of salivary enzymes and oral lesions among gas station workers compared to nearby shopkeepers in Tehran. Journal of Contemporary Medical Sciences. 4, 3 (Sep. 2018).