11.   But the small number of cigarettes masks a grave risk, the researchers say.

12.   Device makers reply that the hospitals are putting patients at grave risk to save money.

13.   For Ms. Bhutto, who was flying to Karachi Friday night from Islamabad, the capital, the situation posed grave political risks.

14.   For Clinton, adultery would knowingly be a particularly grave risk of the presidency, given his pre-White House record and reputation.

15.   Greenspan explained why the times have changed, and why those who ignore the competitive new world do so at grave risk to their economic welfare.

16.   Healthy adults usually recover from the illness, but children and the elderly are at grave risk.

17.   He warned that there was a grave risk of war breaking out accidentally, given the intensity of the border confrontation.

18.   He warned the nation that the peacekeeping mission carries grave risks.

19.   Human rights monitors and African watchers say conditions are ripe for an even greater explosion of killing in Burundi, putting civilians at grave risk.

20.   If the motion to dismiss is defeated, however, the process agreed to by the Senate on Friday poses grave risks to Clinton.