Concerns about his health led to calls for him to step down.

For several groups, however, the concern over security has led to some side benefits.

But increased public concern has also led to more private charity.

Campbell's deep concern for social justice led him to serve the community at large.

Concern about the bombings, which killed one person, has led to an increase in security measures.

Concern about this has led to a suspension of any new American aid.

The concern over legal certainty leads on to my third point.

Concern over the preservation of the remains has even led to legislation.

However, concern for those she left behind led her to become a partisan fighter.

This concern has led to the regulation of the spectrum.