Sometimes a combination of medication and psychotherapy or counseling is needed.

A combination is needed because RU486 alone produces complete abortions in only about 60 percent of cases.

So combinations of drugs will probably be needed, researchers say.

Most officials here have come to the conclusion that some combination of chemicals, weevils and mechanical harvesting will be needed.

To do that, some combination of air and ground power would be needed, he said.

In practice, a combination of scientific approaches is usually needed.

Still, he said, a combination of both approaches would probably be needed.

But lawmakers in both parties said that a combination of the two approaches was needed.

Instead, it said "a combination of perspectives is needed to drive forward the required changes".

Often a combination of both is needed.