Toxicology: The learning curve

Toxicology: The learning curve
http://www.nature.com/news/toxicology-the-learning-curve-1.11644

"Researchers say that some chemicals have unexpected and potent effects at very low doses — but regulators aren't convinced."

Full PDF Article:  http://www.nature.com/polopoly_fs/1.11644!/menu/main/topColumns/topLeftColumn/pdf/490462a.pdf