Peer review panels established in each of the 11 Regions to review all urgent status listings for liver and heart candidates. The RRB reviews justification forms submitted by each center documenting the severity of the candidate's illness and justifies the status at which the candidate is listed. Liver RRBs review listings for all liver candidates in Status 1, special case exceptions for MELD/PELD liver candidates, and hepatocellular carcinoma (HCC) candidates. Thoracic RRBs review listings for heart candidates in Status 1A and special case heart candidates in Status 1B. These boards also consider appeals of cases initially turned down for a particular medical urgency status. In 2004 a national Lung Review Board was established. See also Conflict of Interest, Lung Review Board (LRB), Peer Review.