As 15-month-old Addyson Valley got progressively worse in intensive care, her doctors decided to take her off formula, the Milwaukee Journal-Sentinel reports. One of them, Children's Hospital of Wisconsin's Alan Mayer, says he thought to himself, "It's the Nic story again."

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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.