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His team has even sent pleas over Twitter to the Stanford community and regional biotech companies calling for donations of reagent assemblies, such as kits from Zymo and Qiagen.

Another company — Zymo Research of Irvine, Calif. — has also developed an at-home kit that it hopes to get into the hands of first-responders and companies so that they can test employees.

Zymo acts as a middleman, passing the sample to Pangea Laboratory in Costa Mesa, Calif., said Marc Van Eden, vice president of business development at Zymo Research.

The test, offered by Zymo Research in Irvine, uses chemical modifications to DNA that accrue over a lifetime, called an ‘epigenetic clock’, to determine a person’s age.

In the Hildesheim case, Zymo, which bought an exclusive licence to Horvath’s test in 2016, compared the refugee’s sample with those of five others who had similar ethnic backgrounds and whose ages were known.