About three weeks ago, as posted here, a questionable 2-year study by Gilles-Eric Séralini and colleagues that suggested that rats fed of diet of Monsanto's Roundup-tolerant GMO corn had a higher risk of developing cancer than rats on a non-GMO diet. In follow up, last week, the European Food Safety Authority (EFSA) announced it had dismissed the findings, describing the study to be of, "inadequate design, analysis and reporting," and finding, "that it is of insufficient scientific quality for safety assessment."
The EFSA review noted, in particular, that the low number of rats used in the study were, "insufficient to distinguish between specific treatment effects and chance occurrences of tumours in rats." Also that the study's design, analysis, and reporting was of "insufficient scientific quality for safety assessments."
Compounding the controversy, the authors are also maintaining an unusual degree of secrecy regarding the actual data. Although the study was published by Elsevier in the peer-reviewed Journal of Food and Chemical Toxicity, Dr. Séralini and his colleagues have yet to provide any of the primary data for the study. Notably omitted from the publication are the actual numbers (not relative percentages) of rats that died or developed tumors in each experimental group over time.
As is standard for scientific journals, the publisher specifies that, "Authors may be asked to provide the raw data in connection with a paper for editorial review, and should be prepared to provide public access to such data." In response to the veil of secrecy, a petition is circulating with over 700 signatures of scientists and colleagues calling on Dr. Séralini to provide the actual data on which the study reports.