Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP387_r117906](http://classic.wikipathways.org/instance/WP387_r117906) 'IL-6 signaling pathway' in Mus musculus has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference