11.   However they caution that the relatively small numbers of students in both studies makes it difficult to draw any firm generalisable conclusions.

12.   We said it would be difficult, erm and that discussion has proved how difficult it is to come to a firm conclusion.

13.   Biot stressed that it was too early to draw firm conclusions about the virus until the blood samples were tested.

14.   A few people in the marketplace were bold enough to come to firm conclusions, but they were divided among themselves.

15.   But he said this subsample was too small to support firm conclusions.

16.   But Laya said the number of undetected cancers were too small to allow the researchers to draw any firm conclusions.

17.   But instead of a weakness, that lack of a firm conclusion is a strength.

18.   But, she added, most studies have been poorly designed, too small, or too short to draw firm conclusions.

19.   Cantor said too little is known about the incident to draw firm conclusions.

20.   David Poltrack, the executive vice president of research for CBS, noted that it was far too early to draw firm conclusions.