11.   About two years later, he left Canada to become assistant director of clinical research for a New Jersey foundation working to improve contraceptive drugs.

12.   Ahrens designed studies that are still considered models of clinical research.

13.   Brown said such agreements probably would include clinical research at the hospitals, in conjunction with the basic research carried out at the institute.

14.   But beyond these efforts, some say, is a need for a more focused national agenda for clinical research.

15.   But dyslexia, which can range from mild to severe, has many causes, and scientific studies and clinical research have yet to pinpoint a specific treatment.

16.   But doctors say that biomedical research, especially clinical research, is different because it can influence the care and treatment of patients.

17.   But Kevin Frost, director of clinical research at the American Foundation for AIDS research, said immunology and AIDS has only recently become a research priority.

18.   But little clinical research has been done on any of it, and some members of the health care community question the theories behind the diet.

19.   But only a few are supported by well-designed clinical research.

20.   But some doctors who do clinical research say that they often are offered studies that would require them to stretch far beyond their areas of medical expertise.