The health officials who use the reports say they make important epidemiological studies possible.

He said more study was needed, especially large epidemiological studies.

With that information coming in, the department designed an epidemiological study.

He was doing an epidemiological study of resistance cases in the area.

It will also deal with epidemiological studies to try and determine the situation finally.

Health officials in other countries have also been convinced by the epidemiological studies.

Researchers used data from a large epidemiological study, following subjects over a 10-year period.

Some epidemiological studies found an association between head trauma and the disease.

This is a major advantage over other forms of epidemiological study.

A recent epidemiological study concluded that older parents are more likely to have girls than boys.