Corrections

Minerva

BMJ 2006; 333 doi: http://dx.doi.org/10.1136/bmj.333.7559.137-a (Published 13 July 2006) Cite this as: BMJ 2006;333:137

Several readers spotted Minerva's assertion, in her second item in the 17 June issue, that lithium is a divalent ion (BMJ 2006;332:1460). It is in fact a monovalent ion (unlike calcium, which, as she said, is divalent).

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