Diagnostic approach to cholestasis in the ICU. DILI, drug-induced liver injury; ERCP, endoscopic retrograde cholangiopancreatography; ICU, intensive care unit; MRCP, magnetic resonance cholangiopancreatography; PSC, primary sclerosing cholangitis; RUCAM, Roussel Uclaf Causality Assessment Method; SSC-CIP, secondary sclerosing cholangitis in critically ill patients; TPN, total parenteral nutrition; US, ultrasound.