Rasheed, Burhan, et al. “Renal Doppler Ultrasound As Predictor of Renal Impairment in Patients With Hepatitis C and Its Correlation With Serum Creatinine”. Pakistan Journal of Physiology, vol. 16, no. 2, June 2020, pp. 52-55, doi:10.69656/pjp.v16i2.1221.