Shiekh, Yassar, Aamir Javed Khan, and Shafqat Shabir Bhawani. “Role of Duplex Ultrasonography in Patients With Renal Parenchymal Disease: Renal Resistive Index Vs Serum Creatinine Level”. International Journal of Advances in Medicine 6, no. 5 (September 23, 2019): 1438–1441. Accessed October 10, 2025. https://www.ijmedicine.com/index.php/ijam/article/view/1929.