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The U.S. National Institutes of Health failed to ensure that results of roughly half of clinical trials funded by the agency — both those conducted by its own scientists and outside researchers — were reported to a federal database during a recent two-year period, a new government review has found.

Of the 72 trials funded by the NIH, results for just 35 studies were reported in 2019 and 2020 to, a federal repository for information on studies. But the agency did not ensure that researchers running 37 trials complied with reporting requirements. NIH researchers ran 57% of the studies that were reported, and 43% of those not reported.

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