Corrections
Brackets (parentheses) in formulas
BMJ 2011; 343 doi: https://doi.org/10.1136/bmj.d5296 (Published 17 August 2011) Cite this as: BMJ 2011;343:d5296The previous version of this Statistics Notes article by Douglas G Altman and J Martin Bland in the Research Methods and Reporting section (BMJ 2011;343:d570, doi: …