11.   Also, endoscopic treatment has the advantage of pre-emptying the obstruction that may result from radiotherapy.

12.   An in vivo treatment would have far greater commercial potential because it could be packaged in vials and handled like any conventional drug that is injected.

13.   And the timed treatments have improved survival rates for people with leukemia and ovarian cancer.

14.   And the treatments may have harmful side effects.

15.   Any cancer treatments have harsh side effects, including nausea, hair loss and diminished immunity.

16.   But conventional treatments have their own drawbacks, which is why many doctors recommend supplementing them with natural treatments.

17.   But experts say such abbreviated treatment has little lasting effect.

18.   But many AIDS advocates say treatment has to be part of any response.

19.   But Paul and other AIDS researchers and advocates noted that the treatment has substantial drawbacks.

20.   But, he said, the treatment will have to be improved to achieve higher levels of the clotting factors.