title: Clustering of cancer.
mesh_terms: D000818:Animals; D002140:California; D002353:Carrier State; D004196:Disease Outbreaks; D004197:Disease Reservoirs; D004199:Disease Vectors; D006689:Hodgkin Disease / Q000453:epidemiology / Q000635:transmission*; D006801:Humans; D007087:Illinois; D007938:Leukemia / Q000453:epidemiology / Q000635:transmission*; D009820:Ohio; D009858:Oncogenic Viruses / Q000472:pathogenicity; D013781:Texas