Quasi-Experimental Comparison between Upper and Lower Calyceal Approach in Percutaneous Nephrolithotomy for Complex Renal Calculi in Bangladesh. IAHS Med. J. [Internet]. 2024 Aug. 29 [cited 2026 Jun. 30];6(1):62-7. Available from: https://banglajol.info/index.php/IAHSMJ/article/view/75708