Six medical centers have begun a three-year clinical trial with sickle cell patients using the drug.

The Florida researchers now are in the midst of a large, three-year clinical trial involving six institutions and, eventually, 210 melanoma patients.

It is anticipated the train will travel approximately 600,000 km over the three-year trial.

In 1988, after a three-year trial, he was convicted of high treason.

At home, a three-year trial ended with four black leaders convicted of treason for arousing opposition to Government policy.

Now, she said, "a little over 3,000" test subjects have been signed up for the three-year trials nationwide.

It was finally agreed that the station could be reopened on a three-year trial.

If this review showed that the move would be beneficial, the government would then initiate a three-year trial to evaluate the impact of the change.

In 1986, after a three-year trial, he was found not guilty.

A three-year trial concluded in 1988, and the remaining killers received the verdict of life imprisonment.