1.   A number of experiments already have been conducted with mixed results.

2.   A similar mixed result had attended the efforts of earlier canal engineers.

3.   Abrams leads an eight-piece band plus a vocalist, with mixed results.

4.   Controlled studies to date of the effectiveness of covert sensitization offer mixed results.

5.   He has been juggling lineups all season with mixed results.

6.   Here, he shoots for Capra-esque comedy with mixed results.

7.   Investigation of these predictions has yielded mixed results.

8.   Studies have had mixed results in looking for a link between coffee and heart disease.

9.   Such studies have yielded mixed results.