11.   The Thai government itself admits that the lowest reported blood lead levels are three times higher than those in the West.

12.   Although it has estrogenlike effects, it does not raise blood levels of estrogen, according to the lead researcher, Dr. Victor R. Grann, an oncologist.

13.   Among participants in the Framingham Heart Study, much higher rates of atherosclerosis in the arteries feeding the brain were found among those with high blood levels of homocysteine.

14.   And additional muscle also helps to decrease cholesterol levels and blood glucose levels.

15.   And high blood levels of homocysteine may encourage clogged arteries.

16.   And indeed they do, in relatively large doses in people who have both high blood pressure and high blood cholesterol levels or atherosclerosis.

17.   And it took as little as one-third the blood levels of the drug typically associated with street use to produce the effect.

18.   And since hostility and stress raise blood levels of homocysteine, it may explain why these emotional states are linked to heart attacks.

19.   Another section of the report noted that blood levels of the chemotherapy drug were measured regularly throughout treatment by an experiment test.

20.   As blood levels of carbon dioxide rise and oxygen levels fall, the hapless sleeper struggles to take a breath.