1.   Subsequent tests demonstrated that this was not the case and that significant amounts of PCBs remain after treatment with quicklime.

2.   And if the examinations expose flaws that make them change the equipment during testing, they must pay for subsequent tests as well.

3.   Barbara Stewart, a spokeswoman for the CDC, said that the initial tests were not as precise as subsequent tests.

4.   A subsequent HIV test found him negative, but the three-day wait for the results was interminable, Piccirillo said.

5.   But subsequent tests at the FBI laboratory in Washington were inconclusive.

6.   But subsequent tests ruled out problems such as cancer, AIDS or other auto-immune system-related diseases.

7.   But subsequent tests were negative.

8.   By Thursday morning, subsequent tests by state and federal labs confirmed the bacteria was Bacillus anthracis.

9.   FDA officials say a single positive result requires that the tissue be discarded, regardless of how many subsequent negative test results are obtained.

10.   Fingerprint experts point out that the error rate was lower on subsequent tests.