RecruitingProcedureCold Water Irrigation Therapy as an Adjunct to Indomethacin for Post-Endoscopic Retrograde Cholangiopancreatography(ERCP) PancreatitisThis study is designed to learn whether rinsing the papilla with cold water at the end of an ERCP procedure, in addition to standard medicine, can help lower the chance of developing pancreatitis, which is the most common major complication after ERCP.