11.   Insurers have everything to gain by supporting clinical trials.

12.   It was, however, a preliminary report, made before clinical trials had taken place.

13.   No treatment at any stage of disease has been shown to improve survival in an adequate clinical trial.

14.   The drug has undergone a number of clinical trials.

15.   The drug has undergone extensive clinical trials.

16.   The drug is being evaluated in clinical trials.

17.   The new drug is being evaluated in clinical trials.

18.   The online journal of current clinical trials, a scientific electronic journal, is to be launched this month.