On the basis of early human experiments, they consider it ineffective.

But there are many unanswered questions about these first human experiments.

But some investigators question whether the science is ready for human experiments.

Now the first tests from human experiments are coming in, and they show success as well, the researchers say.

"In two weeks the human experiments will begin, but there's no doubt as to the outcome."

He was in trouble because he'd been pursuing the "human experiments" case for the past year and a half.

It is not always easy, they say, to be the subject of a human experiment.

Since the two procedures were well established, they said, the study was not a human experiment.

In recent years, more than just the number of human experiments has increased.

The thing arrived only a decade or two after the first human experiments with radio.