title: Problems with using numbers needed to harm.
authors: University of Manchester, Manchester M13 9PL, UK benjamin.williams-4@postgrad.manchester.ac.uk.
authors: Benjamin D
authors: BD
authors: Williams
mesh_terms: D000925:Anticoagulants / Q000009:adverse effects*; D001281:Atrial Fibrillation / Q000150:complications*; D005260:Female; D006470:Hemorrhage / Q000139:chemically induced*; D006801:Humans; D008297:Male; D051436:Renal Insufficiency, Chronic / Q000503:physiopathology*; D014859:Warfarin / Q000009:adverse effects*
chemical_list: D000925:Anticoagulants; D014859:Warfarin