Renal Resistive Index and Estimated Glomerular Filtration Rate in Nondiabetic Chronic Kidney Disease Stage 3: A Cross-Sectional Analytical Study, Wongmanit, Patnaree, Sriyakul Kusuma, Tungsukruthai Parunkul, Supasyndh Ouppatham, and Phetkate Pratya , Pharmacognosy Journal, June 2024, Volume 16, Issue 3, p.538-544, (2024)