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An error occurred in the first sentence of this article (18 April, p 1189). Broca's area is responsible for the production of sound patterns of speech and Wernicke's area for the perception (not the other way round).
German doctors vote to prescribe heroin to misusers
An error occurred in the last sentence of the third paragraph (4 April, p 1038). The 1000 heroin misusers in the project were aged 20 or older.
