Peto, R. (1991) BMJ. 1991 302(6781): 906.
This publication is a letter to the BMJ so no abstract is available, but the full text can be viewed online.
This letter to the BMJ from the distinguished medical statistician Sir Richard Peto provides a critical evaluation of the methodology and interpretation of a randomised controlled trial in which the authors reported benefits for non-verbal intelligence test scores following multivitamin and mineral supplementation for 12 weeks. (Schoenthaler et al 1991)