School of Medicine
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Ronald L. Dalman MD
Dr. Walter C. Chidester Professor
Current Research and Scholarly InterestsVascular biology, arterial remodeling, aneurysm development; innovative treatment strategies for AAA, animal models of arterial disease, arterial remodeling and flow changes in spinal cord injury, genetic regulation of arterial aneurysm formation
Affiliate, Dean's Office Operations - Dean Other
Resident in Surgery - Plastic & Reconstructive Surgery
BioHalley Darrach is a PGY-1 plastic and reconstructive surgery resident at Stanford Health. She received her medical degree from Johns Hopkins and her bachelor's in cellular biology from California State University Northridge. While at Hopkins, Dr. Darrach completed a dedicated research fellowship studying oncologic reconstruction outcomes under the mentorship of Dr. Justin Sacks and worked as a medical illustrator. Prior to residency, she spent several years conducting astrobiology research at the Jet Propulsion Laboratory and at a biotech startup company, where she helped adapt NASA technology for medical and counterterrorism applications. While she is currently undecided as to subspecialty, Dr. Darrach's research interests include microsurgery, oncologic reconstruction, gender affirming surgery, ethnic plastic surgery, societal perceptions of deformity, and use of medical illustration in surgical education.
Social Science Research Professional II, Stanford-Surgery Policy Improvement Research and Education Center
BioKristen Davis, MPH is the Lead Social Science Research Professional and has been working at Stanford since 2013, she joined S-SPIRE in March of 2018. She has a background in biology as well as public health. She supports multiple Principal Investigators with their current funded projects as Project Manager, she also is the Supervisor to the Social Science Research Professionals within S-SPIRE. Kristen also assists with the grant submission process within the Department of Surgery acting as a liaison with the Research Management Group. She is passionate about her work and works hard to help make sure Stanford remains a competitive research institution.
Aaron J. Dawes, MD, PhD
Assistant Professor of Surgery (General Surgery)
BioDr. Dawes is a board-certified, fellowship-trained colon and rectal surgeon. He is also an Assistant Professor in the Department of Surgery, Division of General Surgery at Stanford University School of Medicine.
Dr. Dawes treats a wide variety of conditions involving the colon, rectum, and anus, always leveraging the latest evidence and technologies. He is fully trained in minimally invasive surgical techniques--including laparoscopic, robotic, and trans-anal minimally invasive surgery--and strives to employ them, whenever possible, in an effort to reduce pain and shorten recovery.
In addition to his clinical work, Dr. Dawes is a health services researcher, receiving his Ph.D. in Health Policy and Management from the UCLA Fielding School of Public Health. His research focuses on policy development, measurement, and evaluation for patients with colorectal conditions. He is particularly interested in using data to drive policy interventions aimed at reducing disparities in quality, access, and value.
Prior to joining Stanford, Dr. Dawes completed a residency in General Surgery at the University of California, Los Angeles followed by a fellowship in Colon and Rectal Surgery at the University of Minnesota. He has authored articles in the Journal of the American Medical Association (JAMA), Cancer, Diseases of the Colon and Rectum, Health Services Research, and JAMA Surgery. His work has also been featured in the Los Angeles Times, the Daily Press, and HealthDay News.
A native of the San Francisco Bay Area, Dr. Dawes received his A.B. in Public and International Affairs from Princeton University and his M.D. from Vanderbilt University.
Vivian de Ruijter
Instructor, Assistant Director, Stanford-Ucsf Pediatric Device Consortium, Surgery - Pediatric Surgery
BioDr Vivian Emmely de Ruijter is a Stanford University trained physician in healthcare technology innovation. She is a senior manager for Manatt's digital and technology consulting practice, which offers innovative full-service business consulting and legal services, as well as venture capital. Vivian works with healthcare technology and medtech companies to create clinical, regulatory, business and marketing strategies. A medical professional, Vivian leverages her clinical experience to build solutions that advance innovation in healthcare.
In addition to her current role at Manatt, she serves as the Assistant-Director of the Stanford Pediatric Device Consortium in collaboration with the U.S. FDA. She was also the 2016 Gerhard Grube’s Innovation Fellow at Byers Center of Biodesign at Stanford University after completing her training in hybrid interventional strategies at the IRCAD in France. Dr de Ruijter holds a Doctor of Medicine (MD) degree from The Erasmus University in the Netherlands, a post-doctoral designation in Biodesign, Pediatric Healthcare Technology Innovation, and Surgical Education and Innovation from Stanford University School of Medicine and School of Bioengineering, and completed the Stanford Ignite Program at the Stanford Graduate School of Business, an executive program focused on the fundamentals of business administration. She continues to teach at Stanford University and co-teaches among others MED275B, an undergraduate course in the fundamental principles of Biodesign.
You may find additional information on Dr de Ruijter's activities and accomplishments through the following websites:
Daniel James Delitto, MD, PhD
Assistant Professor of Surgery (General Surgery)
BioDr. Delitto is a fellowship-trained surgical oncologist with a focus on conditions of the liver, pancreas, and stomach. He is an assistant professor in Stanford Medicine’s Department of Surgery.
His education includes a decade of postgraduate training in complex general surgical oncology, as well as a PhD in immunology with an emphasis on cancer biology. He completed a clinical fellowship at Johns Hopkins University and continued his research at the postdoctoral level in the laboratory of Dr. Elizabeth Jaffee. His research focus is on advancing the field of cancer immunology and harnessing his findings to improve immunotherapies.
He was the principal investigator of two studies examining the immune response to pancreatic cancer, including one funded by the National Cancer Institute.
Dr. Delitto has presented the findings of his research at conferences such as the American Association for Cancer Research, Society for the Immunotherapy of Cancer, American Association of Immunologists, American College of Surgeons, Academic Surgical Congress and Pancreas Club. In addition to cancer immunology, he has also presented work focused on cancer cachexia, surgical outcomes, translational experimental models and a variety of other oncologic topics.
He has published original work in Nature Communications, the Journal of the National Cancer Institute, Cancer Research, Clinical Cancer Research, and other high impact journals. He is also a reviewer for Annals of Surgery, Scientific Reports, Surgery, Tumor Biology, Journal of Surgical Research, PLOS ONE, and the Journal of Translational Medicine.
Dr. Delitto has earned numerous honors related to clinical excellence, teaching and research. He is board certified by the American Board of Surgery and a member of the Society of Surgical Oncology, American Association for Cancer Research and American Association of Immunologists.
Frederick M. Dirbas, MD
Associate Professor of Surgery (General Surgery)
Current Research and Scholarly InterestsMy research interests are focused on minimizing the impact of breast cancer from a diagnostic and therapuetic standpoint. Breast MRI is a powerful tool to facilitate the screening for and staging of breast cancer, and can be valuable adjunct to guide breast surgery. Oncoplastic surgical techniques optimize cosmesis after breast cancer surgery. Accelerated radiotherapy after lumpectomy decreases radiotherapy treatment times from 6 weeks to just 1 to 5 days.
Monica M. Dua, MD
Clinical Associate Professor, Surgery - General Surgery
Current Research and Scholarly InterestsTechnical aspects of minimally invasive pancreatic and liver surgery
Minimally invasive strategies for the management of pancreatic necrosis
Management of severe acute pancreatitis – academic vs community treatment
Multidisciplinary treatment of HCC; institutional barriers to appropriate referral/ care
Endocrine/exocrine insufficiency after pancreatectomy; volumetric assessment
Natural history and management of pancreatic cysts
Professor of Surgery (Pediatric Surgery) and, by courtesy, of Bioengineering
Current Research and Scholarly InterestsIntestinal lengthening for short bowel syndrome
Intestinal stem cell therapy for intestinal failure
Skin derived precursor cell therapy for enteric neuromuscular dysfunction
Intestinal tissue engineering