Long term studies will be needed to assess if this effect is maintained.

Long term studies seem to show that surgeons experienced with the technique have very few complications.

There are no long term studies about its effect on pregnancy and lactation.

It does not have the atmosphere to deserve the term study as yet.

Other long term studies, which were publicly funded, have uncovered no health issues.

This has begun to change as longer term studies are emerging.

Well designed, long term studies evaluating the efficacy of these treatments have not been done.

Long term studies on the dynamic processes of vegetation change continue.

Because the syndrome is rare and so newly identified, there are no long term studies.

Until recently there weren't enough kids who'd been treated to do a long term study on.