A clinical trial has suggested these agents may be of use in treating malaria.

But some trials have suggested that the challenge of an impeachable accuser may be greater when the accused is a public official.

Preliminary clinical trials suggest that the devices are safe and that they have the potential to be effective.

However, clinical trials suggested the treatment might be linked to a slightly increased risk of stroke.

They and others following the cases say the trials suggest that the country is beginning, at least tentatively, to acknowledge its recent history.

The unpublished trials failed to show any benefit for the drug and suggested that it might increase the risk of suicide.

A trial in Puerto Rico suggests that the committee may have stopped too soon.

A single trial suggested that garlic may prevent occurrences of the common cold but more studies are needed to validate this finding.

But a small clinical trial suggests that the problem may be easily solved, by increasing the dose.

Previous trials have suggested that the result should be an oscillatory decline.