The scientific evidence backing up the clearance of many medical devices is often not publicly available, according to a study appearing in JAMA Internal Medicine.

Through its 510(k) process, the US Food and Drug Administration clears moderate to high-risk medical devices for use, often by device makers showing that their product is" substantially equivalent" to one already on the market, the study notes.

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The New York City medical examiner is overseeing an effort to identify missing persons using DNA, according to the Associated Press.

Nobel laureate Günter Blobel has died at 81, the New York Times reports.

In PNAS this week: mouse model of genetically induced emphysema, gene expression signatures of circulating melanoma cells, and more.

A phylogenetic analysis indicates two venomous Australian spiders are more closely related than thought, the International Business Times reports.