This is the first nationwide study of violent death in schools, the authors say.

Now, the first nationwide study of corporate participation in schools shows that by doing good, companies are also doing well.

A nationwide study showed that about 11 percent of pregnant women were taking illegal drugs.

The nationwide Federal study showed overall smoking rates had increased by one third among high school students between 1991 and 1997.

A frequently cited nationwide study claimed that last year, 375,000 children may have been affected by their mother's drug use during pregnancy.

There have been few nationwide studies analyzing the incarceration figures.

There is an urgent need for a nationwide study of voting times.

He wanted her to be part of his nationwide study of centenarians.

They used medical data from 11 tumor registries established in a previous nationwide study.

A major nationwide study by the fashion industry has concluded that the French are getting taller and heavier.