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February 23, 2010

The National Institutes of Health is proposing to expand its definition of human embryonic stem cells, enabling the university researchers it finances to work with cells derived from a very early human egg. The proposal will benefit several academic researchers and a company, Advanced Cell Technology, that has filed a request with the Food and Drug Administration to test a treatment for macular degeneration, an eye disease. If approved, it would be among the first clinical tests of embryonic stem cells, which were first discovered in 1998.