11.   All these patients had patchy anhidrosis and two had positive cardiovascular tests.

12.   One patient had had a positive test before repeat fundoplication, but was now reflux free, and the test was positive in only two patients.

13.   A high frequency of positive tests for IgG anti-lactoferrin antibodies was found in sera from patients with ulcerative colitis and primary sclerosing cholangitis.

14.   All patients with sclerosing cholangitis and positive tests for anti-lactoferrin had ulcerative colitis.

15.   But the proportion of positive tests was up... to five point four per cent from four per cent.

16.   Also under the old system, Erickson was among the last to find out about a positive test.

17.   An older woman with a positive test for the virus should then have further tests to look for cancer or precancerous conditions, the researchers said.

18.   Andro was taken to prolong the effects of the more powerful anabolic steroids that competitors had stopped taking weeks before the Games to avoid a positive test for steroids.

19.   And yet a positive test for another illness does not mean that anthrax is not also present.

20.   Andro was taken to prolong the effects of the more powerful anabolic steroids that athletes stopped taking weeks before competitions to avoid a positive test for steroids.