11.   The economic downturn will heighten the anxiety about health coverage for many more Americans.

12.   This has heightened anxiety among copyright holders, who fear they will lose control of their creative vision.

13.   U.S. stocks were mixed after a report showing the biggest jump in economic growth in a decade heightened anxiety that the Federal Reserve will raise interest rates next month.

14.   When they do, they will heighten anxiety among consumers, who are likely to react by curbing their free-spending ways.

15.   He also said racial tension and violence in neighboring Indonesia had heightened anxiety between Chinese and Malay Singaporeans.

16.   The sense that the lull could end any minute heightens the anxiety.

17.   Their anxiety has been heightened by a continuing stream of earnings warnings.

18.   Their anxiety has been heightened by another spate of earnings warnings.