But the company must then do a larger, controlled trial to show that the drug actually prolongs lives.

Controlled clinical trials are necessary to assess the value of this therapy.

Millennium has been conducting a larger, controlled trial with about 670 patients to confirm the drug's effectiveness.

There are no prospective placebo controlled trials of preventive treatment.

Most countries had signed the agreement to control trials of new genetically modified foods strictly.

Effect of soybean protein on blood pressure: A randomized, controlled trial.

Controlled clinical trials showed that levamlodipine is rarely associated with these side effects.

Web-based weight management programs in an integrated health care setting: A randomized, controlled trial.

A randomised double blind placebo controlled trial of fish oil in high risk pregnancy.

Results of a prospective placebo controlled double blind trial.