51.   Previous research showed that one session of endurance exercise reduced the level of fatty particles in the bloodstream.

52.   Strassberg wanted to understand the motivation that drives wired lonely hearts, as previous research on personal ads has focused mostly on those placed in newspapers.

53.   Stress during pregnancy has been associated by previous research with premature births and birth defects.

54.   Taken together with previous research, the new findings may help lead to better ways of protecting against prion diseases by sorting out how the proteins survive and grow.

55.   The authors said previous research had failed to show whether treating the endometriosis improved fertility.

56.   The Denmark study released Thursday confirmed previous research showing the carcinogenic effects of alcohol generally.

57.   The findings, which appeared in Nature magazine this week, go further than previous research in showing just what the human brain can learn without consciously trying.

58.   The negative finding stands in sharp contrast to previous research.

59.   The new study also supported previous research that has linked a moderate intake of alcohol to protection against heart disease.

60.   The new study backs up previous research contending that thousands of deaths each year in the United States are directly linked to air pollution.