Recent studies suggest they may be more common than had been thought.

Most studies, however, suggest they could just as well try something else.

But a new study suggests that where one lives may play an important role.

Current studies suggest that at least five times a week is best.

In the past, some studies suggested increased risk and others did not.

But another reason may be that they have run out of money, a large study suggests.

Perhaps, but don't think too hard if you want to do well, a new study suggests.

A new study suggests that the answer may be yes.

Some studies, though, have suggested an association between the two.

A new study of high school students suggests that they are right.