However, new research began to appear in the beginning of the 1990s.

Particularly in the last 10 years, much more research has begun.

The research has only recently begun, and more time is needed to judge any success.

But in recent months medical research has begun to offer hope for people who test positive.

But new research is beginning to provide a clearer picture.

This occurred because the research that started in 1940 now began to show.

Questions have also been raised about earlier research and a new debate has begun.

Professor Cohen says research on that issue is just beginning.

This makes me very angry, as I really believed in "is" before the research began.

The research and study for the need of a dedicated law enforcement training center began in the 90's.