11.   Health insurers scrambled to discredit the findings, conducted by researchers at the Harvard School of Public Health and the Kaiser Family Foundation.

12.   Here, researchers conduct tests on both human volunteers and animals to determine the health effects of ozone and other air pollution.

13.   In a military exercise this past summer called Dark Winter, researchers conducted a simulated smallpox attack on Oklahoma City.

14.   In an undated photo, a researcher conducts tests on simulated anthrax in petri dishes, one of which has been treated with a decontaminant.

15.   Instead, European researchers usually conduct trials that compare the experimental drug to a standard therapy.

16.   It was conducted by researchers from the University of Wisconsin at Madison.

17.   Last month, the University of California at San Francisco admitted, after media inquiries, its researchers conducted a cloning experiment that failed.

18.   Loprinzi said that researchers elsewhere are conducting a fourth study involving the antidepressant Zoloft, which has not been reported.

19.   Ms. Borakove said that researchers were conducting DNA, toxicology and histology tests to determine, among other things, whether Ms. Alves had been raped.

20.   Panel members also raised questions about how consistently researchers could conduct the test, with some using it much more accurately than others.