21.   When a Belgian patient developed cancer, doctors there tested the other kidney-failure patients for cancer.

22.   World fears started to rise Thursday when the Kenyan minister of public health announced cloth samples sent to a Nairobi doctor had tested positive for anthrax.

23.   Doctors test mutant virus to hunt cancer cells.

24.   Doctors tested it on women with invariably fatal advanced breast cancer that had spread to other parts of their bodies.

25.   Doctors will test this idea in a large study, sponsored by the National Cancer Institute, that will get under way in about three months.

26.   Doctors test for anemia by measuring the percentage of oxygen-carrying red cells in the blood.

27.   Doctors tested Chandrasekeran for alcohol, but said he had not been drinking.

28.   Doctors tested the device on people with especially severe heart failure, all of whom were already receiving standard heart medicines.

29.   Doctors tested the HeartMate, the most widely used assist device, in patients with severe heart failure.

30.   Doctors have tested all sorts of things that DeVoter came into contact with in the months before he fell ill, but have found no clues.