But critics of drug education programs, old and new, contend that far too little scientific evaluation has been done to know for certain.

The decision about Wayne returning to play was based on scientific evaluation.

Experts say a thorough scientific evaluation of the site will be needed before they can arrive at a firm figure.

At this point, survival rates for all seem to be comparable but full scientific evaluation is lacking.

Its main weakness is that it has never been subject to a scientific and medical evaluation.

However, neither belief has been shown in independent scientific evaluations.

We should not be setting priorities for scientific evaluations here.

Thus, labelling requirements must be brought in for scientific evaluation to take place.

Also conducts scientific evaluation to support such regulations and related policy development.

Furthermore, it plans to develop systems for balanced and scientific evaluation on 26 languages.