School of Medicine
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Ronald L. Dalman MD
Walter Clifford Chidester and Elsa Rooney Chidester Professor of Surgery
Current Research and Scholarly Interests Vascular 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
Bio Halley 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. 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, Health Services Research Unit
Bio Kristen Davis, MPH is a Social Science Research Coordinator who 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. Her interests include health disparities as well as outcomes research. She supports multiple Principal Investigators with their current research as well as assists with the management of federal grant submissions.
Aaron J. Dawes, MD, PhD
Clinical Instructor, Surgery - General Surgery
Bio Dr. 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
Bio Dr 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:
Biostatistician 2, Health Services Research Unit
Bio Qian works as a Biastatistician at Stanford Surgery Policy Improvement Research & Education (S-SPIRE) Center. She is experienced in analyzing patient outcomes and national surgery-related data sets such as NSQIP, SEER. She participates in consultations with investigators to refine research questions, define hypotheses, design studies and devise analysis plans. Her expertise is implementing data analysis through statistical programming, summarizing findings using tables and figures, and assisting in preparation and submission of abstracts and manuscripts. She is thrilled to be able to contribute to researches that aim to improve public health.
Frederick M. Dirbas, MD
Associate Professor of Surgery (General Surgery) at the Stanford University Medical Center
Current Research and Scholarly Interests My 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.