The scientists said their goal was to permit a more rational perspective on what people and regulators worry about as possible causes of cancer.

But consumers and regulators in Europe worry that the crops could pose a threat to humans or the environment.

But federal regulators and some safety researchers worry that hands-free devices may give a false sense of security.

The regulators and analysts worry that in a severe economic downturn the losses at commercial banks might overwhelm the deposit insurance fund.

But regulators, who are starting to receive complaints from people who have bought these investments, worry about the future.

Among other things, regulators worried that the additive, while improving engine performance, might increase emissions of pollutants.

The exception is important because banks and regulators had worried that a sudden plunge in financial markets could send a bank's capital below regulatory minimums.

Well before it collapsed, regulators and some professional investors worried that the system of oversight was breaking down.

There was a time when regulators worried about the impact of leverage on both markets and speculators.

German regulators worry about some of these acquisition plans, as well, though that is thought to be less important to them than the Internet matter.