Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP135_r125589](http://classic.wikipathways.org/instance/WP135_r125589) 'IL-6 signaling pathway' in Rattus norvegicus has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference