1.   But only lab tests, he said, will prove a definitive link.

2.   He let me do lab tests sometimes.

3.   The anti-viral drug has also been shown to inhibit the growth of borna virus in lab tests.

4.   We need the results now.

5.   I thought the water might be making us sick, and my suspicions were confirmed by the lab tests.

6.   And lab tests are not always definitive.

7.   As of Friday, lab tests had not revealed the strain of rabies that killed Maria Fareri.

8.   Because there is no diagnostic lab test for CFS, doctors must first rule out conditions with similar symptoms, such as lupus or multiple sclerosis.

9.   A lab test revealed she had an infection, one that is easily treated, but only if caught in time.

10.   A lab test confirmed that it matched the paint of the Cheung Son.