Laupacis A، Sackett DL، Roberts RS (1988). "An assessment of clinically useful measures of the consequences of treatment". N. Engl. J. Med. ج. 318 ع. 26: 1728–33. DOI:10.1056/NEJM198806303182605. PMID:3374545.
Hutton JL (2010). "Misleading Statistics: The Problems Surrounding Number Needed to Treat and Number Needed to Harm". Pharm Med. ج. 24 ع. 3: 145–9. DOI:10.1007/BF03256810. ISSN:1178-2595.
Laupacis A، Sackett DL، Roberts RS (1988). "An assessment of clinically useful measures of the consequences of treatment". N. Engl. J. Med. ج. 318 ع. 26: 1728–33. DOI:10.1056/NEJM198806303182605. PMID:3374545.
Hutton JL (2010). "Misleading Statistics: The Problems Surrounding Number Needed to Treat and Number Needed to Harm". Pharm Med. ج. 24 ع. 3: 145–9. DOI:10.1007/BF03256810. ISSN:1178-2595.