Molecular Epidemiology in HPV and Cervical Cancer – Mark Schiffman & Julia Gage, NIH Scientists Read their story: Mark Schiffman, M.D., M.P.H., and Julia Gage, Ph.D., M.P.H., use the tools of molecular epidemiology to predict and prevent cervical cancer at the National Institutes of Health (NIH) Intramural Research Program (IRP). Dr. Schiffman is a Senior Investigator and Dr. Gage is a Postdoctoral Fellow in the Clinical Genetics Branch of the Division of Cancer Epidemiology and Genetics (DCEG) at the National Cancer Institute (NCI).