Found 1 pathways with zero (PubMed) references
* [http://classic.wikipathways.org/instance/WP558_r126246](http://classic.wikipathways.org/instance/WP558_r126246) 'Complement and coagulation cascades' in Homo sapiens has zero references;
More details at https://www.wikipathways.org/WikiPathwaysCurator/ReferencesTests/atLeastOneReference