The same book review was erroneously published twice, once in Medical History, vol. 56, issue 4, pp. 600–601Footnote 1 and again in Medical History, vol. 57, issue 1, pp. 142–144.Footnote 2 Subsequently it is necessary to retract the second appearance of the review in favour of the first for there to be a single version of record. The Press and the Editors apologise to the author and readers for this mistake.
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