Confounders were ignoredBMJ 2008; 336 doi: http://dx.doi.org/10.1136/bmj.39493.418704.1F (Published 21 February 2008) Cite this as: BMJ 2008;336:403
- Luca Puccetti, president
- 1Promed Galileo Medical Society, Pisa 56011, Italy
Bolland et al did not control for vitamin D concentrations during their study but said only that the women with serum 25-hydroxyvitamin D concentrations below 25 nmol/l were excluded.1 This implies that serum concentrations of …
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