One area of persistent concern all week has been bank stocks.

Stock prices fell amid persistent concerns about the pace of the economic recovery.

But the survey showed persistent concerns about weak demand, bloated payrolls and falling prices.

Intel's problems illustrated investors' persistent concerns about the technology sector.

For many social workers, the use of any online technology is problematic due to persistent concerns about privacy.

Attendant care was another persistent concern, as was transportation, employment, and travel.

However persistent concern regarding these studies is the adequacy of matching cases and controls.

The new generation of writers has expressed persistent concern with structure and more global themes.

And rising energy prices are another persistent concern for the economy.

The United States trade deficit has been a persistent concern for years, of course.