1.   No drug has been proven globally effective in IBS.

2.   Although traditional medicines have not been proved effective in stemming the course of HIV, many doctors here believe that they can ease the vague symptoms of early infection.

3.   Aspirin has been proved effective in men and is now being studied in women.

4.   Both sides claim theirs has been proven effective and both claim widespread police support.

5.   A similar group of drugs has been proved effective in battling the virus that causes AIDS, when used in combination with other drugs.

6.   But all involved say major obstacles may be encountered before it can be proven effective in people.

7.   But few programs have been studied enough to be proven effective.

8.   But ex vivo treatment, though costly and cumbersome, is the only approach that has been proven effective so far.

9.   But the drugs can cause unpleasant side effects, making light therapy more attractive, if it is proved effective.

10.   But the report said the vaccine was never proven effective against airborne spores, which is how anthrax would be used as a weapon.