11.   But no previous research effort in the Arctic Ocean has approached the scope and complexity of Sheba or used a ship embedded in ice as a headquarters.

12.   But it goes a step further than previous research in that it measures precisely how dangerous poor fitness is in relation to other leading risk factors for premature death.

13.   But previous research suggests that whether someone reports being happy is surprisingly independent of factors like income, age and level of education.

14.   By contrast, previous research showed benefits from stimulants, but only followed the children for a few days or weeks.

15.   Ford said that previous historical research had found that forced laborers were treated better at the Cologne factory than elsewhere.

16.   He also criticized the study for extrapolating the effects and exposure to PCBs from previous research rather than actual data from the Hudson River.

17.   Her previous research dealt with issues like health, date rape and risk-taking.

18.   His curiosity was piqued by previous research on the need for the vitamin.

19.   In previous research, Koren and others have shown that Prozac, the best-known SSRI,is safe for use during pregnancy.

20.   Meanwhile, statistics are expected to show the medical community is capitalizing on previous research breakthroughs to slow the spread of AIDS to the lowest level ever.