Rodanant, P., Langlongsathit, T., Sermkasemsin, W., Leysak, O., & Surarit, R. (2016). The effect of LED light on viability and proliferation of periodontal ligament fibroblast cells. Mahidol Dental Journal, 37(1), 23–28. retrieved from https://he02.tci-thaijo.org/index.php/mdentjournal/article/view/179996