Acquaintance networks and disease.
D000293:Adolescent; D000328:Adult; D006801:Humans; D007398:Interpersonal Relations; D007938:Leukemia / Q000453:epidemiology / Q000635:transmission*; D008223:Lymphoma / Q000453:epidemiology / Q000635:transmission*; D009518:New York; D013029:Space-Time Clustering