1.   As for Stewart, the family developed grave concerns about his health.

2.   As I have said, we have expressed our grave concern.

3.   He told them he had received reports that had caused him grave concern.

4.   However, there was grave concern about the future of the avionic department there.

5.   It is a matter of grave concern.

6.   It was none the less a moment of grave concern to unbelievers of any reliable militancy.

7.   This disagreement was a matter of grave concern to the US.

8.   This is a matter of grave concern to the hospital management.