title: Care needs to be taken when reviewing malignancy data reported from observational studies: comment on the article by Onel and Onel.
authors.forename: Xavier
authors.initials: X
authors.lastname: Mariette
authors.forename: Alan
authors.initials: A
authors.lastname: Reynolds
authors.forename: Paul
authors.initials: P
authors.lastname: Emery
mesh_terms: D001327:Autoimmune Diseases / Q000188:drug therapy*; D006801:Humans; D016867:Immunocompromised Host; D009369:Neoplasms / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000037:antagonists & inhibitors*
chemical_list: D014409:Tumor Necrosis Factor-alpha