In randomised prevention and therapeutic trials these rules are not followed.

The studies mark the first therapeutic trials of psychedelic drugs in the United States since the 1970's.

This therapeutic trial has been suspended pending an investigation.

Elimination of the placebo effect is fundamental to the reliability of any therapeutic trial.

Sleep-related topics include disorders, psychological research, pharmacology and therapeutic trials.

Zinc in ulcerative colitis: a therapeutic trial and report on plasma levels.

In 2007, over 200 patients were accrued to therapeutic trials.

Empirical therapeutic trials should be used in those patients in which other techniques have failed.

They are expensive and should be promptly stopped if they are not effective after a short therapeutic trial.

"The immediate benefit involves selecting patients and monitoring the response of people at risk" in therapeutic trials, he said.