I would say this should not be a big source of concern to you.

His departure was a source of concern for some in Atlanta's civil rights community.

To Japan's leaders this is a source of concern that the cities have become much too big.

It was a great source of concern at the time.

But that is a major source of concern for many Democrats.

Martin's health was always a source of concern but she lived until 1975.

But his hitting has been a source of continued concern.

It has been a constant source of concern ever since.

The events last week, such a short time before the elections, are a source of further concern.

For parents, air bags in general have been a source of concern.