Niu, Jian, et al. “Mesenchymal Stem Cells Prolong the Survival of Orthotopic Liver Transplants by Regulating the Expression of TGF-β1”. Turkish Journal of Gastroenterology, vol. 29, no. 5, Jan. 2018, pp. 601-9, doi:10.5152/tjg.2018.17395.