1.   As drugs like Avastin advance through clinical trials, scientists are finding that other drugs already on the market help block blood vessel formation, too.

2.   ACE inhibitors work by blocking the formation of a natural chemical, angiotension II, that makes blood vessels constrict.

3.   DDT accumulates in female birds and blocks calcium formation.

4.   Hirulog, on the other hand, works by blocking the formation of thrombin, which acts to create a fibrous mass that is a component of blood clotting.

5.   If squalamine is tested in humans, it will join several other experimental drugs that block formation of new blood vessels and are being tested against several ailments.

6.   In June, Indonesia blocked the formation of a panel to hear the U.S. complaints.

7.   Instead it disrupts their molting cycle by blocking the formation of chitin in their bodies.

8.   Proscar shrinks the gland by blocking formation of a crucial hormone.

9.   The European Commission has blocked the formation of a joint venture to broadcast television and data via satellite and cable throughout the Nordic region.

10.   The issue is blocking the formation of the new government for Northern Ireland envisioned in the peace settlement signed last April.