The agency has been studying the issue for years.

But the agency has not studied the people themselves.

Ms. Brown said that the agency was studying new procedures as a result of the case.

He said his agency would study the health institutes' report, which it received today.

The agency will also study the possibility of expanding its two new centers.

She said the agency was studying the ruling and had not decided how to proceed.

The agency is still studying the committee's recommendation and promised to act within months.

Nonetheless, he said the agency would study the suggestion seriously.

Nor has any federal agency studied the deaths to determine what caused them.

The agency is now studying new definitions and other rule changes.