If you care for an in-depth back and forth between the IARC and the ESFA, I can recommend this[1] collection of letters between the head of the ESFA and the head of the IARC at the time. If you are interested in the particular scientific criticisms of the IARC Monograph by the ESFA you can read this amazing letter[2], which is also in the collection mentioned above.

It's in the annex of that document. It's a very good read.

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[1]: http://www.efsa.europa.eu/en/press/news/160113

[2]: http://www.efsa.europa.eu/sites/default/files/EFSA_response_...