Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP355_r116981](http://classic.wikipathways.org/instance/WP355_r116981) 'IL-1 signaling pathway' in Rattus norvegicus has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference