But more studies are needed to know how well it really works.

But he said more study was needed before making those reports public.

Because of its new status, environmental studies were needed in order to continue the project.

He said further studies were needed to address that question.

So a study of all these plants is needed before any action can be taken.

Further study and analysis are needed to determine the full potential.

Further study would be needed to prove its true nature.

"Further studies are needed to determine the cause of low B12 levels."

Although more studies are needed, the evidence so far is promising.

He added that the new study is needed to see whether the figures mean anything.