By Emily Singer

The select few who have had their genomes sequenced learn to use that information for health care.

Several months after deciphering his genetic code last year, Stanford bioengineer Stephen Quake approached a cardiologist colleague. Early analysis of his DNA had flagged a rare genetic variant as potentially linked to heart problems. The variant, in fact, was located in a gene linked to sudden cardiac death in athletes, so physician Euan Ashley suggested Quake visit his office for some follow-up screening. Inspired by that meeting, the scientists spent the next year figuring out how to examine his genome in a way that would be meaningful to both Quake and his doctor.

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