School of Medicine


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  • David A. Relman

    David A. Relman

    Thomas C. and Joan M. Merigan Professor and Professor of Microbiology and Immunology

    Current Research and Scholarly InterestsMy investigative program focuses on human-microbe interactions and human microbial ecology, and primarily concerns the ecology of human indigenous microbial communities; a secondary interest concerns the classification of humans with systemic infectious diseases, based on features of genome-wide gene transcript abundance patterns and pther aspects of the host response.

  • Brian Richter

    Brian Richter

    Administrative Services Manager, Pediatrics - Gastroenterology

    Current Role at StanfordAdministrative Services Manager, Department of Pediatrics, Division of Gastroenterology, Hepatology, & Nutrition

  • Michael J Rosen, MD, MSCI

    Michael J Rosen, MD, MSCI

    Stanford University Endowed Professor for Pediatric IBD and Celiac Disease

    BioDr. Rosen is a pediatric gastroenterologist and physician scientist who has been devoted to advancing inflammatory bowel disease (IBD) research and care for 25 years. He is the inaugural Stanford University Endowed Professor for Pediatric IBD and Celiac Disease. He is also Director of the Stanford Medicine Children’s Health Center for IBD and Celiac Disease, which has achieved nationally leading clinical outcomes under his direction. Dr. Rosen’s research expertise crosses mucosal immunology and epithelial biology and clinical and translational investigation. His NIH-funded laboratory has demonstrated the protective role for type 2 cytokines in chronic intestinal inflammation and advanced intestinal organoids as a model to study IBD. His clinical research has demonstrated how proactive therapeutic drug monitoring can be incorporated into clinical practice to optimize ant-TNF therapy treatment response. Dr. Rosen led the multicenter ARCH Study, which demonstrated the importance of intensified anti-TNF drug dosing in pediatric acute severe ulcerative colitis. Presently, he is co-principal investigator for the Crohn's & Colitis Foundation’s Cohort for Pediatric Translational and Clinical Research in IBD (CAPTURE IBD) which will advance precision medicine for children with IBD.

    After graduating from Duke University, Dr. Rosen attended Harvard Medical School, followed by pediatrics residency at Boston Children’s Hospital and Boston Medical Center. He pursued his pediatric gastroenterology fellowship at Vanderbilt University Medical Center, where he received a Master of Science in Clinical Investigation. He started his faculty career at Vanderbilt and then moved to Cincinnati Children’s Hospital and the University of Cincinnati College of Medicine. There he rose to Medical Director of the Schubert Martin IBD Center and Associate Director for Faculty Development in the Gastroenterology division before moving to Stanford in 2021. Dr. Rosen serves on the editorial board for Inflammatory Bowel Diseases and the National Scientific Advisory Committee for the Crohn’s & Colitis Foundation. Outside of work, Dr. Rosen enjoys spending time with his wife and two children at their activities, watching movies, downhill skiing, and getting outside.

  • Zachary M. Sellers, MD, PhD

    Zachary M. Sellers, MD, PhD

    Adjunct Professor, Pediatrics - Gastroenterology

    BioDr. Sellers is a pediatric physician-scientist and research and clinical development consultant. As a pediatric gastroenterologist and ion channel physiologist, Dr. Sellers' work in academia and pharma over the last 20 years has focused on improving the lives of individuals with complex and rare diseases through providing cutting-edge clinical care and advancing research and drug development. Dr. Sellers previously led a basic and translational research laboratory at Stanford, focused on epithelial ion transport and acid-base regulation using a variety of human and animal models. He is a firm believer in the exponential impact of team science and is adept working in multi-disciplinary and cross-functional teams. He seeks out strategic partnerships and opportunities that can leverage his expertise and leadership to advance innovative therapies for areas of high unmet need and to support the development of the next generation of physician-scientists. Dr. Sellers received his BS (Animal Physiology and Neuroscience) and BA (Japanese Studies) from the University of California. San Diego, his MD and PhD (Molecular and Integrative Physiology) from the University of Illinois at Urbana-Champaign, and was trained in Pediatrics and Pediatric Gastroenterology, Hepatology, and Nutrition at Stanford, where he was previously a faculty member and attending physician. He held multiple leadership positions at Stanford, including Associate Chief of Research in Gastroenterology, Director of the Stanford Children's Pancreas Program, Lead Gastroenterologist for the CF Program, Director of the CFTR Phenotyping and Theratyping Program, and Physician-Scientist Advisor for the Pediatrics Residency Program.