41.   CDC researchers presented new evidence that people most at risk of infection are becoming more likely to let down their guard.

42.   Intel researchers will present the two technologies Monday during the International Electron Device Meeting in Washington.

43.   Researchers presented the results of several large studies on the drug Monday at a conference sponsored by the American Society for Microbiology.

44.   Researchers presented data on one of these, developed by Tibotec-Virco, that appears to be especially potent in initial testing.

45.   Researchers presented their findings Monday at the fall meeting of the American Geophysical Union here.

46.   Researchers presented the results of several large studies with the drug Monday at a conference sponsored by the American Society for Microbiology.

47.   Skeptics said the researchers presented incomplete and misleading data.

48.   The researchers presented their findings Monday at an international conference at Nijmegen Catholic University in the Netherlands.

49.   The researchers presented their preliminary findings at the annual meeting of the American College of Cardiology in Orlando, Florida.

50.   Researchers presented the case of the chimpanzee at a scientific conference in Washington.