PPARA and primary biliary cholangitis: (TS=(peroxisome proliferator-activated receptor agonist OR PPAR OR bezafibrate OR fenofibrate OR seladelpar OR MBX-8025 OR elafibranor OR saroglitazar)) AND (TS=(primary biliary cholangitis OR primary biliary cirrhosis OR PBC)) AND (TS=(randomised controlled trial OR controlled clinical trial OR randomised OR randomly OR RCT))