31.   In a San Francisco laboratory study, Clomid was shown to affect human reproductive tissue grafted into mice much as DES does.

32.   In approving the test, the drug agency said it had relied on information from laboratory studies and two small clinical trials.

33.   In laboratory studies, the protein interferes with the activity of plasminogen, a substance in blood that helps break down clots, Dr. Hobbs said.

34.   In laboratory studies, Goldschmidt and his colleagues found that platelets from women tended to clump more than those from men.

35.   In laboratory studies, melanosomes from human skin can inhibit micro oganisms.

36.   In some cases laboratory studies suggested risk but there were no studies in the field to test if harm did or did not occur.

37.   Independent experts noted that the aquatic frogs Hayes studied, Xenopus laevis, are frequently used in laboratory studies but are not native to the United States.

38.   It used a statistical study examining rates of a rare brain cancer called neurocytoma, as well as a laboratory study.

39.   Laboratory studies on animals have shown that the chemical can harm the liver, kidneys, and nervous system and, in high concentrations, possibly cause cancer.

40.   Laboratory studies are often cited in the debate over whether electromagnetic fields from power lines, microwave ovens and cellular phones cause cancer or other health problems.