Other researchers have challenged such criticism.

At the study's end, after six months, the researchers challenged the remaining nine children with a full 8-ounce glass of milk or a placebo drink.

Other researchers challenged the findings after they were unable to confirm the results.

The news that some researchers were challenging the benefits of yearly screening mammograms has provoked widespread confusion and debate.

Many researchers have challenged the generalizability of the model.

Other researchers challenged him at meetings and in print.

But other researchers, including Dr. Siegel, have challenged this theory.

These researchers first challenged Starr's article by examining expressed preference - how much risk people say they are willing to accept.

However, recently, researchers in experimental economics and experimental finance have challenged this assumption empirically.