The study did not deal separately with black men because few participated in the research.

This last point is especially true of studies dealing with people who are deceased.

This study dealt with the natural history of the Cape.

The study dealt largely with data from the nineteenth century.

Yet even those studies deal with probabilities and do not rule out all risk of harm.

Her study deals specifically with Canada, but the conclusions are more general.

Yet, as noted earlier, studies of poor families have dealt primarily with white households.

Another issue is the way in which experimental studies deal with potential confounding variables.

The study did not deal with chiropractic care, which also involves spinal manipulation.

But those studies largely dealt with the stylistic phenomenon rather than its underlying causes.