There are, however, certain factors that must be present in a contract of service.

But certain factors may increase the chances of getting it.

Certain factors may increase the risk that heart late effects will occur.

Perhaps the trouble was the time chart itself, or certain factors which it did not include.

But certain factors appear to increase the risk of getting kidney cancer.

The explanation appears to be certain factors in the labor market.

Certain factors increase the risk that hearing loss will occur.

Certain factors related to treatment increase the risk of second cancers.

Certain general factors have, however, to be borne in mind.

This assessment will enable the training to be based on certain factors which seem most important.