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Biomedicine

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graphic of an evidence hierarchy

Evidence hierarchies, one version shown, classify types of studies according to the strength of evidence they provide. But a recent paper challenges the assumptions behind these hierarchies.

skin

SKIN REPAIR A 7-year-old with a rare genetic condition lost most of the top layer of his skin, the epidermis. Scientists used a combination of stem cells and gene therapy to repair the damage.  

Artificial insulin-secreting cells

SUGAR CHECK Artificial insulin-secreting cells (shown in this false color cryo-electron microscopy image) could offer automatic, ultrafine blood sugar regulation for diabetes patients.

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