@article {McAlister549, author = {Finlay A. McAlister, MD MSc}, title = {The {\textquotedblleft}number needed to treat{\textquotedblright} turns 20 {\textemdash} and continues to be used and misused}, volume = {179}, number = {6}, pages = {549--553}, year = {2008}, doi = {10.1503/cmaj.080484}, publisher = {CMAJ}, issn = {0820-3946}, URL = {https://www.cmaj.ca/content/179/6/549}, eprint = {https://www.cmaj.ca/content/179/6/549.full.pdf}, journal = {CMAJ} }