41.   Previous research indicated that smoking may actually protect against breast cancer, because some breast cancers are fueled by estrogen, and smoking can decrease estrogen production.

42.   Previous research indicates selenium should thwart prostate cancer, but giving smokers extra beta-carotene theoretically should have prevented lung cancer, too.

43.   Previous research on cognitive mapping has included monitoring the brain activity of rats as they run through mazes, and looking at the abilities of people with hippocampal damage.

44.   Previous research showed that Ecstasy destroys serotonin-carrying axons, Ricaurte said.

45.   Previous research already has demonstrated the effectiveness of more intensive insulin therapy in reducing the incidence of eye, kidney and nerve disorders among persons with diabetes.

46.   Previous research found that moderate alcohol consumption increased levels of high-density lipoprotein cholesterol, the so-called good cholesterol.

47.   Previous research had shown that individuals who rate highly on the scale are at increased risk of developing depression or anxiety disorders.

48.   Previous research has linked these abnormalities to excessive glucose, a form of sugar, in the bloodstream, which is a hallmark of diabetes.

49.   Previous research has shown that perceived speed is guided by contrast in the environment.With decreasing contrast, objects in the outside world seem to go by more slowly.

50.   Previous research on daily stress has relied on small samples of subjects who kept daily diaries.