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Frozanfar, A. and Ramezani, M. and Rahpeyma, A. and Khajehahmadi, S. and Arbab, H. R. (2013) The effects of low level laser therapy on the expression of collagen type I gene and proliferation of human gingival fibroblasts (HGF3-PI 53): In vitro study. Iranian Journal of Basic Medical Sciences, 16 (10). pp. 1071-1074.