71.   Elevated levels of homocysteine are believed to damage the lining of blood-vessel walls, the researchers said.

72.   Elevated levels are a possible indicator of cancer.

73.   Elevated PSA levels can suggest the presence of cancer.

74.   For instance, heart disease has been linked to elevated levels of certain types of cholesterol and to other compounds such as c-reactive protein.

75.   It has been unknown whether the elevated levels were a product of the disease or a cause.

76.   Jaundice can cause a yellowing of the skin and involves an elevated level of bilirubin, which is a naturally occurring byproduct of decomposing red blood cells.

77.   Lawsuits have been filed on behalf of two children in the study who allegedly suffered elevated levels of lead in their blood and irreversible brain damage.

78.   Millions of American men get blood tests every year to check for elevated levels of PSA, an indication that cancer is present.

79.   No hazardous substances had been found in the air except some dust with slightly elevated asbestos levels, the EPA said.

80.   Recently, four Port Authority police officers who worked at the site were reassigned after they showed elevated levels of mercury in their blood.