The guideline, which was issued on 25 July, will take effect in February 2018. It comes in the wake of a tragedy in a French drug study last year that led to the death of one man and serious neurological damage in four others. But some say the revision isn’t going for enough

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The French health ministry said the six male patients had been in good health until taking the oral medication. It did not say what the new medicine was intended to be used for

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