The editors regret the omission of Dr Stuart Carney and Ms Helen Doll as authors of a recent EBM notebook.¹ We apologise to Dr Carney and Ms Doll. The authorship information should be as follows:

STUART CARNEY, MB, ChB, MPH, MRCPsych

Department of Psychiatry, University of Oxford

Oxford, UK

HELEN DOLL, BSc, Dip App Stats, MSc

Department of Public Health, University of Oxford

Oxford, UK