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Physician-scientist Darrell Yamashiro, MD, PhD, has been named director of Columbia's Division of Pediatric Hematology, Oncology, & Stem Cell Transplantation.

A new study shows that in human muscle, mitochondrial DNA mutations arise near the cell nucleus where they trigger molecular changes that promote their own proliferation.

A Mailman study of more than 1 million pregnancies in Finland reports that prenatal exposure to elevated levels of DDT is associated with an increased risk for autism.