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, https://pjp.pps.org.pk/index.php/PJP/article/view/1221.