Thana, A. ., and E. Prateeptongkum. “The Effect of Periodontal Ligament Stem Cell Sheets for Periodontal Regeneration in Animal Studies: A Meta- Analysis”. Journal of The Department of Medical Services, vol. 46, no. 1, June 2021, pp. 107-16, https://he02.tci-thaijo.org/index.php/JDMS/article/view/251703.