IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-9-36656 Original Research Paper A Clinical Study of Patients Undergoing Percutaneous Nephrolithotomy for Symptomatic Renal Calculus: Reported from Darbhanga Medical College Kumar Sahu Dr. Vijay Shankar Prasad Dr. September 2021 10 9 01 02