This Week in PNAS

In the early online edition of PNAS, scientists from Imperial College London and Pfizer report a successful application of metabolic profiling. Using NMR to profile the urine of 99 men who were given acetaminophen, they found that those with higher initial levels of p-cresol sulfate metabolized the drug less effectively than those with lower levels.

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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.