The following DataNodes have no identifier: 2
http://classic.wikipathways.org/instance/WP5033_r118996 http://rdf.wikipathways.org/Pathway/WP5033_r118996/DataNode/cfafa (chronic
inflammation)
http://classic.wikipathways.org/instance/WP5033_r118996 http://rdf.wikipathways.org/Pathway/WP5033_r118996/DataNode/ee0da (citrullination)
More details at https://www.wikipathways.org/WikiPathwaysCurator/DataNodesTests/dataNodesWithoutIdentifier