1.   Another would direct PAP to the golf ball-shaped human immunodeficiency virus, and some scientists believe it still holds promise as an eventual anti-AIDS drug.

2.   But while there is general consensus, even among skeptics, that tissue engineering holds great promise, there is not much agreement on how best to proceed.

3.   No one, however, was talking about abandoning a market that all said holds great promise.

4.   Soy isoflavones, which recent research suggests can help prevent some cancers, holds promise, as does alpha-lipoic acid, which helps certain metabolic processes.

5.   Such advances in genetic testing hold great promise for surveillance and preventive treatments, yet also hold the potential for stigmatization and discrimination.

6.   The economies of Russia, Hungary, Poland and the Czech Republic hold promise, Bryson said.

7.   They are also the source of embryonic stem cells, which scientists say hold great promise for curing human disease because they can grow into many types of cells.

8.   Therapeutic cloning holds great promise as a disease cure, scientists say, although such customized solutions may be prohibitively expensive.