Microbial profile of biliary tract infection in patients undergoing therapeutic endoscopic retrograde cholangiopancreatography (ERCP), and baseline risk factors predicting microbial growth and post-ERCP cholangitis - Hina Ismail; Raja Taha Yaseen Khan; Syed Mudassir Laeeq; Zain Majid; Abbas Ali Tasneem; Farina M. Hanif; Nasir Hasan Luck (Gastroenterology Review)