To Know or Not?

Individuals harboring ostensibly pathogenic variants in two genes linked to cardiac arrhythmias don't always show signs of the condition, researchers led by Vanderbilt University Medical Center's Dan Roden and Sara Van Driest report in the Journal of the American Medical Association this week.

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US Attorney General Jeff Sessions is considering using DNA tests to determine relatedness between adult and child migrants, the Daily Caller reports.

Bloomberg reports that Brainstorm Cell Therapeutics plans to offer a treatment it is developing under the "right to try" law for hundreds of thousands of dollars.

In Nature this week: expansion of disease-resistance genes among long-lived oak trees, and more.

In a proof-of-concept study, researchers report being able to determine age from dried bloodstains, Discover's D-brief blog reports.