Muhammad Bilal Khattak; Ehtisham Haider; Muhammad Hafeez; Khawar Shabir; Rafiudin; Khan, H. COMPARISON OF EARLY NEEDLE-KNIFE SPHINCTEROTOMY VS STANDARD BILIARY CANNULATION IN PREVENTING ERCP ASSOCIATED PANCREATITIS IN CASES OF DIFFICULT BILIARY CANNULATION -A TERTIARY CARE EXPERIENCE. J Ayub Med Coll Abbottabad 2024, 36.