Kirk B Willmarth

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The US Food and Drug Administration (FDA) has recently issued draft guidance on how it intends to regulate laboratory-developed tests, including genetic tests. This article argues that genetic tests differ from traditional targets of FDA regulation in both product as well as industry landscape, and that the FDA's traditional tools are ill-suited for(More)
The islets of Langerhans are endocrine organs characteristically dispersed throughout the pancreas. During development, endocrine progenitors delaminate, migrate radially and cluster to form islets. Despite the distinctive distribution of islets, spatially localized signals that control islet morphogenesis have not been discovered. Here, we identify a(More)
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