51.   Silicone from leaky breast implants could have a protective effect against breast cancer, according to preliminary findings presented in San Francisco.

52.   Studies in northern Italy have suggested a protective effect of tea against cancers of the mouth, throat and larynx.

53.   That notion had gained support from studies that found a protective effect of exercise.

54.   The drug, called fenretinide, had a less potent protective effect than tamoxifen, another breast cancer preventive, but has fewer side effects.

55.   The incident also raises the possibility that the Soviet virus was unusually potent and thus able to overcome at least partially the protective effects of vaccination.

56.   The jury is still out on a possible protective effect of dietary fiber on colon and breast cancer, Willett said.

57.   The protective effect of aspirin, the researchers found, was greatest in the men with the highest C-reactive protein levels.

58.   The protective effects against dementia disappeared with higher levels of drinking, they found.

59.   The recommended course of therapy lasts five years, but the protective effects appear to last five years after a woman stops taking the drug, she added.

60.   The protective effect among the non-Muslim circumcised men did not reach statistical significance.