Tungjaroenpaisal, T. “A Study of the use of the Fixed – dose Combination Sofosbuvir+Velpatasvir (400mg/100mg) for Treatment of Chronic Hepatitis C at Uttaradit Hospital”. Health Science Clinical Research, vol. 37, no. 2, Dec. 2022, pp. 67-77, doi:10.1016/hscr.v37i2.259667.