Susilawati, Tri Nugraha, and Atik Susianto. 2020. “A Systematic Review of the Frequency of Regulatory T Cells in Hepatitis B and Hepatitis C”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy 20 (3):161-68. https://doi.org/10.24871/2032019161-168.