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The National Institutes of Health announced Thursday that it is accepting an Institute of Medicine panel's recommendations to cut back on most research involving chimpanzees. A statement by Francis S. Collins, director of the NIH, noted that scientists have valued research with chimpanzees as "the closest relatives" to humans. And he said key medical advances have been based in part on work with the animals. "However, new methods and technologies developed by the biomedical community have provided alternatives to the use of chimpanzees in several areas of research," he said. While further research with chimpanzees may still be needed in a few key areas, the NIH wants to move away from supporting work where the use of chimpanzees is not truly necessary, he said. While the NIH is developing procedures to to adopt this approach, the agency will not make new awards for research involving chimps.