1.   American and Swedish researchers are conducting two trials in several centers in each country to compare surgery to watchful waiting.

2.   As well, UF researchers are conducting field studies to evaluate the usefulness of existing crossings.

3.   At UCLA, researchers conducted a long-running medication-withdrawal study.

4.   Before beginning the prevention trial, the Australian researchers conducted a preliminary study to test the criteria they were using to determine high risk.

5.   A second would be to subject marijuana to clinical trials of the sort that researchers would conduct into the efficacy and safety of any other drug.

6.   A spokesman for the Consumer Product Safety Commission said its researchers were conducting broader studies, expected to be completed in the spring.

7.   Boots and Knoll contended that the study, which was conducted by researchers at the University of California San Francisco, was flawed, Mayer said.

8.   Boots contended that the study, which was conducted by researchers at the University of California San Francisco, was flawed, Mayer said.

9.   But because there was no consensus on the amount of blood required, the researchers conducted the government-financed study.

10.   But now, several researchers are conducting studies that randomly assign women to have radiation or to forgo it.