concern about something
concern over something
concern with something
concern for something

If Deanna's job had not been to be concerned over the mental health of the crew, she would still have acted exactly the same.

Legend has it that the duel concerned a dispute over another woman.

The script originally concerned the magical search for control of the sea and power over the earth.

There is no scientific basis to be concerned over her pronouncements.

The debate concerned the value of intelligence satellites over spies.

Corporate leaders do not appear to be concerned over any possible negative effect on productivity and profits.

In the aftermath of the war the government was said to be concerned over Turkey's increasingly prominent international role.

"You need not concern yourself over matters in London."

So many people who would concern themselves over her.

Investors appear to be concerned over cooling growth and a rising American trade deficit.