The district has just over 10,000 students based on recent studies.

This is based on a small study however and further research will be needed.

The numbers are based on a study by a public interest group, Common cause.

His advice was based on studies of nearly 8,000 patients.

The findings were based on a study of more than 45,000 men over 12 years.

The report was based on a study of 374 patients admitted to a hospital in 1997 and 1998.

The image was based on an earlier study and a smaller 1859 version.

The research was based on a 10-year study of 2,541 men who ranged in age from 40 to 69.

The findings were based on a study of 9,764 Americans ages 25 to 74 over 20 years.

The finding, which appears in the journal Science, is based on a small study.