Can Anyone Make Sense Of The Hayes Frog Test Data? Dr. Tyrone Hayes has been one of the primary proponents of the theory that atrazine causes endocrine effects in amphibians. CRE asked in a FOIA request that EPA release all data Dr. Hayes submitted to EPA on this issue. CRE was told by EPA that Dr. Hayes refused to allow EPA to release all of his data. CRE raised this issue at EPA's SAP review of the amphibian effects issue, and EPA agreed to release the Hayes data. Attached are the relevant data. CRE admits that it is not an expert on these frog tests, but the Hayes data do not seem to make any sense. Can anyone make sense of them? Click here for the Hayes data