Bert Vogelstein is Director of the Ludwig Center, Clayton Professor of Oncology and Pathology and a Howard Hughes Medical Institute investigator at The Johns Hopkins Medical Institutions. A pioneer in the field of cancer genomics, his studies on colorectal cancers revealed that they result from the sequential accumulation of mutations in oncogenes and tumor suppressor genes. Wikipedia*
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Bert Vogelstein has one video in the C-SPAN Video Library; the first appearance was a 2001 Senate Committee.