Is endoscopist-directed sedation for endoscopic retrograde cholangiopancreatography with balanced propofol solution (BPS) practical and safe? A prospective study from a tertiary care centre in India - Raina, Hameed; Prakash, Anukalp; Ashraf, Umaymah; Raina, Manzoor (Gastroenterology Review/Przegląd Gastroenterologiczny, 2021)