11.   Although current tests seem to have virtually eliminated blood-borne HIV infections, they have proven less effective at detecting hepatitis.

12.   An offensive line effective at both run and pass blocking.

13.   And analysts say that by aligning with AOL, Warner Music could be more effective at selling its back catalog in the form of digital music files.

14.   And it may inspire you to start a process of self-discovery that could enrich your life and make you more effective at whatever you do.

15.   And they can be effective at helping citizens organize.

16.   And when rumors of layoffs or other bad news are rampant, the office grapevine is very effective at uncovering the facts.

17.   Another herb, astragalus, is less trendy but more effective at actually preventing colds.

18.   Any substitutes must prove as effective at dry cleaning and degreasing, while also being biodegradable and nontoxic.

19.   Anyway, the Raiders are discovering that Bruce may be most effective at defensive tackle, not outside.

20.   Applewhite has better touch on timing patterns and is especially effective at throwing the fade pass.