National Geographic News, Reporting Your World Daily

Monday, November 23, 2009

Photo: "Stem Cell Tourists" Go Abroad for Unproven Treatments


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When a stem cell (above) divides, the new cells have the potential to become more specialized cells, such as heart or liver cells.

Doctors offering unproven treatments using stem cells are luring Americans to far-off locales and potentially dangerous procedures.

Photography courtesy National Institutes of Health