51.   He said older studies involved too few women, and showed the test only detected the type of abnormal cells that most likely would not become cancerous.

52.   He said the fact that the study did not involve a group getting dummy pills makes the findings less reliable.

53.   Ruben Gur, director of the Brain Behavior Laboratory at University of Pennsylvania, cautioned that the gender-difference study involved a small number of people.

54.   Studies have generally involved adding resistance genes to other genes in the nucleus of plant cells.

55.   That means that although the study involved thousands of men, the effect seen was driven by a small number of men with unusual eating habits.

56.   That is much higher than most hospitals because the study involved trauma hospitals that treat many accident victims, who are most likely to become donors.

57.   The BP-led study would involve a network almost three times as large as the Hyundai pipeline.

58.   The four-year study involved women with heart disease and tested the effects of hormone supplements on their hearts.

59.   The new study involved volunteers who were closely monitored and checked twice a week.

60.   The latest study involved the Cordis system and was financed by the nonprofit Medlantic Research Institute.