School of Medicine

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  • Mary Ellen Koran, MD, PhD

    Mary Ellen Koran, MD, PhD

    Resident in Radiology

    Bio Mary Ellen grew up in Annapolis, Maryland. She attended college at Duke University, where she majored in Biomedical Engineering with a minor in Chemistry. After graduation, Mary Ellen moved to Nashville, Tennessee to join the Medical Scientist Training Program (MSTP) and earn her combined MD/PhD at Vanderbilt University. She completed her PhD in Human Genetics in the laboratory of Dr. Tricia Thornton-Wells, where she studied the radiogenomics of Alzheimer’s Disease. Outside of radiology, Mary Ellen enjoys swimming with the Stanford Masters' team, mountain biking and hiking the amazing trails around Northern California with her husband, Cody, and playing with their dog, Bowser.



    2017 – Present
    Stanford University – Palo Alto, CA
    Department of Radiology
    Resident Physician

    2016 – 2017
    University of Tennessee – Nashville, TN
    Department of Internal Medicine
    Intern Physician

    2009 – 2016
    Vanderbilt University – Nashville, TN
    M.D. Medical Scientist Training Program

    2011 – 2014
    Vanderbilt University – Nashville, TN
    Ph.D. Human Genetics

    2005 – 2009
    Duke University – Durham, NC
    B.S., Graduation with Distinction
    Biomedical Engineering



    Etta Kalin Moskowitz Fund Research Award
    Awarded by Stanford University Radiology Residency Program, 2017

    Founder’s Award
    Awarded by Vanderbilt University School of Medicine to 1st in class, 2016

    Glasgow-Rubin Citation for Academic Achievement
    Awarded by Vanderbilt University School of Medicine to 1st female in class, 2016

    Roentgen Award
    Awarded by Vanderbilt University School of Medicine Department of Radiology, 2016

    Fellow and Resident Annual Meeting Scholarship
    Awarded by the World Congress of Interventional Oncology for the annual WCIO Conference, 2016

    Alpha Omega Alpha Honor Medical Society
    Vanderbilt University, 2015

    Dr. Constantin Cope Medical Student Research Award
    Awarded by the Society of Interventional Radiology Foundation, 2015

    Society of Interventional Radiology Medical Student Travel Scholarship
    Awarded by the Society of Interventional Radiology for the annual SIR Conference, 2014

    Flexner Dean’s Lecture Student Lecturer
    Awarded by Vanderbilt University, 2013

    NIGMS Travel Fellowship
    Awarded by the National Institute of General Medical Sciences for the Short Course on Statistical Genetics and Genomics, 2011

    Medical Scientist Training Program
    Funded by NIH T32 GM07347, full tuition scholarship and stipend for both medical and graduate school, 2009 – 2016

    Baldwin Scholars Unsung Heroine Award
    Awarded by Duke University, 2009

    Research in Practice Program Grant
    Awarded by Duke University, 2008

    Pratt Undergraduate Research Fellowship
    Awarded by Duke University, 2007-2009



  • Roger Kornberg

    Roger Kornberg

    Mrs. George A. Winzer Professor in Medicine

    Current Research and Scholarly Interests We study the regulation of transcription, the first step in gene expression. The main lines of our work are 1) reconstitution of the process with more than 50 pure proteins and mechanistic analysis, 2) structure determination of the 50 protein complex at atomic resolution, and 3) studies of chromatin remodelling, required for transcription of the DNA template in living cells

  • James R Korndorffer Jr

    James R Korndorffer Jr

    Associate Professor of Surgery (General Surgery) at the Stanford University Medical Center

    Bio James R. Korndorffer, Jr. MD MHPE FACS is Associate Professor and Vice Chair of Education in the Department of Surgery at Stanford University. Previously he served as Vice chair of Surgery at Tulane University Health Sciences Center in New Orleans. While at Tulane he also was the Surgery Residency Program Director, the assistant dean for Graduate medical education and the Medical Director of the Tulane Center for Advanced Medical Simulation and Team Training. He received his undergraduate degree in Biomedical Engineering from Tulane University, his Medical Degree from the University of South Florida College of Medicine and his Masters in Health Professions Education from the University of Illinois Chicago. His general surgery residency was completed at The Carolinas Medical Center in Charlotte, North Carolina and his Advanced Laparoscopic Fellowship was completed at Tulane University.

    He is actively involved in numerous national societies including the American College of Surgeons, the Society for Gastrointestinal and Endoscopic Surgeons, the Association for Surgical Education, and the Association for Program Directors in Surgery. He serves on the American College of Surgeons Committee on Validation of Surgical Knowledge and Skills, SAGES Fundamentals of Laparoscopic Surgery and Development Committees and also serves as the APDS research committee vice chair.

    Dr. Korndorffer has published over 60 papers in peer reviewed journals, 5 book chapters and has presented at over 100 national meetings. Dr. Korndorffer’s clinical interests include minimally invasive surgery for gastrointestinal disorders and hernias. His research interests include surgical education, surgical simulation, patient safety, and patient care quality.

  • Opher Kornfeld

    Opher Kornfeld

    Ph.D. Student in Chemical and Systems Biology, admitted Autumn 2013

    Current Research and Scholarly Interests I am interested in the molecular mechanisms that regulate mitochondrial dynamics. I am using rationally-designed peptide inhibitors to target mitochondrial fission/fusion factors in order to understand the interplay between these factors under normal and stressed cellular conditions.

  • Jon Kosek

    Jon Kosek

    Professor (Clinical) of Pathology, Emeritus

    Current Research and Scholarly Interests Methods of evaluation of biopsies; differentiation and, classification of neoplasms; immunohistochemistry; scanning and, transmission electron microscopy; cardiovascular pathology;, histologic assessment of bone biopsies; heart preservation and, restoration; myocardial biopsies; venous autograft coronary artery, bypass; cardial and heart valve transplantation.