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Requiring conventional sample size calculations might be an impediment to completing translational or early clinical studies, write Peter Bacchetti and his colleagues at the University of California, San Francisco, in a Perspectives article in Science Translational Medicine. "There is little theoretical or empirical support for the conventional requirement that every study must have at least 80% power," the authors write.

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The European Medicines Agency recommends that a warning about the possibility of blood clots be added to the product information.

A new study finds that farmed fish have led to a decline in genetic diversity among Atlantic salmon, the Guardian reports.

According to Agence France Presse, astronauts who are to arrive soon at the International Space Station are to study the effect of microgravity on brain organoids.

In Cell this week: analysis of SARS-CoV-2 B.1.1.7 introductions to the US, increased horizontal gene transfer higher in gut microbiomes linked to industrialization, and more.