Harry's guest for this episode is Dr. Barrett Rollins, the chief scientific officer and faculty dean for academic affairs at Boston's Dana Farber Cancer Institute and the Linde Family Professor of Medicine at Harvard Medical School. Harry and Dr. Rollins dig into how large-scale DNA analysis can one day put much more usable information into the hands of oncologists, and how that data affects individual patients, the practice of medicine, and new therapies under development.

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