Who knew what? And when?

When it comes to chemical regulation, data is key to decision making. An investigation by Swedish academics Axel Mie and Christina Rudén of Stockholm University, reported in the Guardian in June, suggested that several pesticide manufacturers withheld data from brain toxicity studies conducted in the 2000s from EU regulators (as it was not explicitly required at the time), while the data was provided to US regulators, whose requirements were different.