Intraoperative and Postoperative Outcomes after Percutaneous Nephrolithotomy under General and Spinal Anaesthesia: A Prospective Observational Study. - KHAN, NEEHA SAMREEN; KUMAR, RAVI; KUMAR, DHARMENDRA; KUMAR, RAJESH; CHAKRAVORTY, NUPUR; ALI, QUTUBUDDIN (Journal of Clinical & Diagnostic Research, 2026)