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Putting stem cells to the test

To truly know whether a stem cell has the developmental flexibility to give rise to new, therapeutic tissue types, the cells must undergo a definitive test in which they are injected into mice and observed. Yet many say this measure is too slow, too expensive and too unreliable. Elie Dolgin goes in search of a replacement.

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Dolgin, E. Putting stem cells to the test. Nat Med 16, 1354–1357 (2010).

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