1.   Much more research needs to be done to confirm a hormonal basis for depression in women.

2.   Other researchers have praised the study, while warning that more work must be done to confirm it.

3.   Scientists studying this potential link to breast cancer cautioned that research in this area is fairly new and more work needs to be done to confirm their findings.

4.   The company had the survey done to confirm what many analysts have been saying about consumer squeamishness about shopping over the Internet.

5.   The researchers called the findings promising but cautioned that the study was relatively small and that more research needed to be done to confirm the results.

6.   Authorities said more tests would have to be done to confirm the finding.

7.   Final tests were still being done to confirm the lethal ingredient.

8.   Larger studies were then done to confirm this, but they showed no benefit.

9.   More tests are being done to confirm that.

10.   She also said more research should be done to confirm whether increasing food intake might have the same beneficial effect for women.