However, certain studies have shown that video games can be used to improve various eye conditions.

But certain studies have led to a dramatic shift from this way of thinking.

Conversely, certain longitudinal studies have not shown correlation between weight loss and smoking at least among young persons.

Some patients may be suffering from disorders such as compulsive lying, which makes certain studies impossible.

The methodology used in certain studies is also questionable.

More specifically, certain studies have attempted to evaluate treatment strategies that are concerned with sexual abuse.

He listed certain special studies, odd research programs and about a half-dozen other things.

Careful evaluation is needed of these experiences, and this may well involve using certain studies.

In certain studies, determination of pretreatment tumor volume is an important variable.

In purely linguistic terms, there are two reasons for this difference between Belfast and certain other studies.