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John Marshall is a highly experienced professional in the field of Hematology and Oncology. With a background in psychology and medicine, John has held various leadership positions in top medical institutions such as Georgetown University Medical Center and MedStar Health. John is currently the Physician Executive Director at MedStar and serves as the Chief Medical Officer at Indivumed Group. Additionally, John has a strong background in research and education, evident from their role as Director of the Otto J Ruesch Center for the Cure of GI Cancers at Georgetown University. Overall, John is known for their expertise in oncology and personalized medicine.