title: The "Janus" serum research programme: a multipurpose project for retrospective as well as prospective investigations of cancer.
mesh_terms: D000328:Adult; D001782:Blood Donors; D001330:Electronic Data Processing; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D009369:Neoplasms / Q000097:blood* / Q000453:epidemiology / Q000276:immunology / Q000473:pathology; D009664:Norway; D011446:Prospective Studies; D012042:Registries; D012107:Research Design; D012189:Retrospective Studies