Prospective studies are needed to confirm the results of this study.

This could take the form of summer programs, participation in smaller prospective studies, or through some other opportunity.

Similarly, good survival was found in a large prospective study.

A prospective study would involve following the case series over time to evaluate the disease's natural history.

This assumption, however, has still to be supported by prospective studies.

These prognostic groups have yet to be tested in a prospective study.

Definitive evidence of discrimination, however, may be obtained only from a prospective study.

There are very few prospective studies of gender nonconforming girls.

This should be given priority as a matter for examination in the forthcoming prospective study.

The authors of this prospective study, however, did not determine whether any pathogens were present in the material.