June 3, 2009 2:39 PM

Patenting human genes thwarts research, scientists say

Rapid advances in biology and genetics are raising fresh concerns about the spreading practice of patenting human genes. The U.S. Patent and Trademark Office has granted patents to at least 4,382 human genes, including genes related to Alzheimer's, asthma, cancer, muscular dystrophy and other serious diseases.

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