But studies based on comprehensive national data might call into question today's breeding techniques.

The study also called attention to fear among some white parents about integration.

But more recent, randomized studies have called those findings into question.

These can be only regarded as tentative results; the study called for future research with a larger population.

What about bad habits, which the study calls "behavioral risk factors"?

The study called for the district to spend $11,538 per child.

The study also called for increased federal spending to reduce disparities among states.

This study calls for an end to the debate over whether women should or shouldn't work.

But a new study calls both of these ideas into question.

But he said the studies called attention to the inconsistent quality of Her2 testing in many small laboratories.