1.   But today lab reports say the evidence is inconclusive... no link can be proved.

2.   The group which published the report was headed by Sir Richard Doll, the cancer specialist whose work proved the link between smoking and cancer.

3.   Patients suffering from skin cancer are to be asked to take part in research aimed at proving a link between the disease and the radioactive gas radon.

4.   Bernick said scientific studies by recognized authorities still do not prove links between leaking breast implants and physical impairments and immune deficiency diseases.

5.   But no one would likely ever be able to prove that link, experts said.

6.   Dr. Beatrice H. Hahn led a team from the University of Alabama at Birmingham that proved the link between AIDS and chimps.

7.   In Australia, the incidence of the syndrome has sharply declined, Morgan said, but he is not convinced the link is proven.

8.   Inevitably it will take more than suspicion and statistics to prove the link.

9.   Judge Douglas Ginsburg said the government failed to sufficiently prove the link.

10.   Proving such links irrefutably is almost impossible, and many studies have been criticized for methodological or other flaws.