Stanford University


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  • Stephen R. Viess, MD

    Stephen R. Viess, MD

    Clinical Assistant Professor, Orthopaedic Surgery

    BioDr. Viess is a board-certified orthopaedic surgeon with subspecialty board certification in sports medicine.He delivers care at Stanford Health Care – ValleyCare in Pleasanton. Dr. Viess focuses on arthroscopic surgery and sports medicine, with a special interest in arthroscopic reconstruction of the shoulder and knee.

    Topics include the biomechanics of pitching, and shoulder and elbow injuries in the throwing athlete. Dr. Viess is a fellow of the American Academy of Orthopaedic Surgery and a member of the California Orthopaedic Association.

    He strives to offer his patients the most advanced, least invasive surgical procedures, including ACL reconstruction, meniscal surgery, and arthroscopic rotator cuff and labral repairs. Dr. Viess has extensive experience in the management and treatment of sports- related orthopedic injuries. He served as Assistant Team Physician
    for Major League Baseball’s Oakland As, providing game coverage and conducting pre- and post-season physical exams. For six years, Dr. Viess directed the Stanford Health Care – ValleyCare Sports Medicine Program. He also served as the team physician for Granada High School in Livermore, California.

    In addition to his clinical practice, Dr. Viess has conducted research, including a 10-year review of clinical satisfaction, revision rates, and radiographic evidence of stem fixation associated with the Ultimate-C femoral stem. He also led a study evaluating capsular sling repair during total hip arthroplasty.

    Dr. Viess has made numerous presentations to peers and to the community. Peer-targeted topics include graft selection in ACL reconstruction, concussion
    management, and on-field management of spine injuries. At the Lake Tahoe Sports Medicine Conference, he has presented lectures on PCL ruptures, multi-ligament knee injuries, and AC joint sprains. He also has delivered lectures for family practitioners on the evaluation and physical examination
    of orthopaedic patients. For the community, Dr. Viess has made presentations at health fairs and schools. Topics include the biomechanics of pitching, and shoulder and elbow injuries in the throwing athlete.

    Dr. Viess is a fellow of the American Academy of Orthopaedic Surgery and a member of the California Orthopaedic Association.

  • Davis Vigneault

    Davis Vigneault

    Clinical Scholar, Radiology
    Fellow in Rad/Cardiovascular Imaging

    BioDr. Vigneault is a fellow in cardiovascular imaging at Stanford, where he also completed his residency (including a year as chief resident) in diagnostic radiology. Previously, he received his medical degree from Tufts University School of Medicine and his DPhil in Biomedical Engineering from the University of Oxford through the NIH-Oxford Scholars and Medical Scientist Training Programs. For his graduate degree, Dr. Vigneault worked on novel algorithms for measuring regional cardiac function from cardiac CT and MR, publishing in Radiology, Medical Image Analysis, and the Journal of Cardiovascular Magnetic Resonance, among others. In addition to cardiovascular imaging and deep learning, Dr. Vigneault has a strong interest in open science, having been a frequent contributor of software to large open-source libraries such as ITK and related packages.

  • José Vilches-Moure, DVM, PhD

    José Vilches-Moure, DVM, PhD

    Associate Professor of Comparative Medicine

    BioDr. José G. Vilches-Moure, DVM, PhD, Associate Professor, received his DVM degree from Purdue University in Indiana in 2007. He completed his residency training in Anatomic Pathology (with emphasis in pathology of laboratory animal species) and his PhD in Comparative Pathology at the University of California-Davis. He joined Stanford in 2015, is the current Faculty Director of the Master of Laboratory Animal Science (MLAS) Graduate Program, founder and past Faculty Director of the Comparative and Experimental Pathology Post-doctoral Fellowship (2023-2025), and the past Director of the Animal Histology Services (AHS; 2015-2022). Dr. Vilches-Moure is a diplomate of the American College of Veterinary Pathologists, and his collaborative research interests include refinement of animal models, cancer biology and early cancer detection techniques, cardiac development and pathology, developmental pathology, and host-pathogen interactions. His teaching interests include comparative anatomy/histology, general pathology, comparative pathology, and pathology of laboratory animal species.

  • Maria Norma Villalon Landeros

    Maria Norma Villalon Landeros

    Clinical Assistant Professor, Medicine - Primary Care and Population Health

    BioDr. Norma Villalon's path to medicine reflects a journey of perseverance and community service. Born and raised in rural Guanajuato, Mexico, her early years were shaped by strong family bonds and a deep appreciation for community care, despite financial challenges. Before immigrating to the United States at 18, she dedicated herself to adult education through INEA, teaching literacy and basic education to members of her community. This early experience fostered her commitment to serving diverse populations and understanding their unique needs. As a first-generation professional from an immigrant background, Dr. Villalon brings a unique perspective to medicine, informed by her profound understanding of underserved communities. Her journey from a small Mexican village to becoming a physician exemplifies the power of determination and the importance of accessible healthcare. Through her work, she continues to advocate for equitable medical care while actively mentoring and supporting the next generation of physicians from underrepresented backgrounds.

  • Perla Villamor

    Perla Villamor

    Clinical Instructor, Otolaryngology (Head and Neck Surgery)

    BioPerla Villamor, MD, is a Clinical Instructor in the Clinician Educator line in the Department of Otolaryngology — Head & Neck Surgery and the Division of Pediatric Otolaryngology at Stanford University School of Medicine. She completed her medical and otolaryngology training in Colombia, followed by a pediatric otolaryngology fellowship in Mexico.
    She has extensive experience in research, teaching, and clinical practice, having worked in leading institutions across Latin America and the Middle East.
    Her passion for pediatric airway surgery has driven her to collaborate on global surgery initiatives and contribute to international scientific publications. She is deeply committed to working with children and their families to improve their quality of life and ensure they experience happy, healthy childhoods. She is currently pursuing a two-year International Fellowship in Complex Pediatric Otolaryngology at Stanford Children’s Hospital.

  • Anne Villeneuve

    Anne Villeneuve

    Berthold and Belle N. Guggenhime Professor and Professor of Developmental Biology and of Genetics

    Current Research and Scholarly InterestsMechanisms underlying homologous chromosome pairing, DNA recombination and chromosome remodeling during meiosis, using the nematode Caenorhabditis elegans as an experimental system. High-resolution 3-D imaging of dynamic reorganization of chromosome architecture. Role of protease inhibitors in regulating sperm activation.

  • Richard Vinograd

    Richard Vinograd

    Christensen Professor of Asian Art

    BioRichard Vinograd is the Christensen Fund Professor in Asian Art in the Department of Art & Art History at Stanford University, where he has taught since 1989. Dr. Vinograd’s research interests include Chinese portraiture, landscape painting and cultural geography, urban cultural spaces, painting aesthetics and theory, art historiography, and inter-media studies. He is the author of Boundaries of the Self: Chinese Portraits, 1600-1900 (Cambridge: Cambridge University Press, 1992); co-editor of New Understandings of Ming and Qing Painting (Shanghai: Shanghai Calligraphy Painting Publishing House, 1994); and co-author of Chinese Art & Culture (New York: Prentice Hall and Harry N. Abrams, 2001). He has published more than thirty journal articles, anthology chapters, conference papers, and catalogue essays on topics ranging from tenth-century landscape painting to contemporary transnational arts.

  • Edgar Virgüez

    Edgar Virgüez

    Research Engineer

    BioEdgar Virgüez is a Research Engineer in the Department of Energy Science & Engineering at Stanford University, where his work advances sustainable, low-carbon energy systems. His findings have resulted in more than 40 scholarly outputs that have garnered over 900 citations in leading journals, including Energy & Environmental Science, Environmental Science & Technology, Nature Cities, the Proceedings of the National Academy of Sciences of the U.S., & Science. In recognition of his expertise, Dr. Virgüez serves on the Editorial Board of the Environmental Research: Energy journal, and regularly reviews manuscripts for 15 journals (e.g., Nature Communications, Nature Sustainability).

    Beyond his individual scholarship, Dr. Virgüez serves as Managing Director of the $23 million U.S. Department of Energy-funded EARNEST Consortium, a landmark initiative led by Stanford University. This effort brings together 18 universities, three national laboratories, and two research organizations to identify and advance solutions for the future of the U.S. electricity system. Beyond EARNEST, he has collaborated with organizations such as the World Bank and the Inter-American Development Bank, contributing expertise in life cycle assessment, cost-benefit analysis, and decarbonization strategies for governments and utilities across the Americas.

    Globally, Dr. Virgüez contributes to major energy and climate initiatives. Since 2024, he has served as an Expert Advisor to the Earthshot Prize, founded by Prince William, reviewing nominations in the Fix Our Climate category and assessing their potential for innovation, impact, and scalability toward an annual $1.25 million award. He also serves in expert advisory roles for institutions such as Schmidt Sciences, evaluating large-scale research programs advancing scalable decarbonization and energy systems solutions, and provides expert review on energy-related reports for global organizations, including the International Energy Agency.

    For his professional contributions, Dr. Virgüez has received more than 20 awards totaling $34,365. Among his most notable honors, he was recognized by the American Geophysical Union with the Science for Solutions Award (2025), honoring significant scientific contributions to address societal challenges, and received the K. Patricia Cross Future Leaders Award (2020) from the Association of American Colleges and Universities, a national distinction recognizing exceptional rising scholars demonstrating strong promise as future higher education leaders. As an educator, Dr. Virgüez has taught 17 courses to ~600 students, with consistently outstanding evaluations validating his teaching excellence. This achievement was formally recognized with the Graduate School Dean’s Award for Excellence in Teaching (2021) from Duke University.

    In 2022, he was elected as a Young Trustee to the Board of Trustees of Duke University, the institution’s highest governing body. During his three-year term, he served on committees for Graduate and Professional Education and Research, External Engagement, Honorary Degrees, and the Young Trustee Nominating Committee, which he chaired for one year. He currently sits on the Climate Commitment Campaign Advocates Board, where he advises the university on the major philanthropic initiative on climate change.

    Dr. Virgüez holds a Ph.D. in Environmental Sciences and Policy with a Certificate in College Teaching (2022) and an M.A. in Environment with a Geospatial Analysis Certificate (2018) from Duke University, along with an M.Sc. in Environmental Engineering (2010) and a dual B.Sc. degree in Chemical and Environmental Engineering (2009) from Universidad de los Andes. He has also completed professional certificates in Australia, the United States, and Colombia, and has received more than $795,000 in scholarships and fellowships from competitive programs sponsored by institutions such as the Sloan Foundation.

  • Mrigender Singh Virk

    Mrigender Singh Virk

    Clinical Associate Professor, Pathology

    BioDr. Mrigender Virk completed his residency in Anatomic & Clinical Pathology at Georgetown University before joining Stanford for his Transfusion Medicine Fellowship. After completion of the fellowship, Dr. Virk joined the Department of Pathology as a member of the faculty for Transfusion Medicine. Dr. Virk is currently the Director of the Transfusion Medicine Laboratory and the Blood Banking & Transfusion Medicine Fellowship Program. His work has primarily focused on the improvement of blood bank inventory management through optimization of O-neg RBC utilization and waste mitigation of all blood products in an expanding enterprise footprint. Dr. Virk has also improved inventory efficiency and safety through the implementation of pathogen reduced platelets and pathogen reduced cryoprecipitated fibrinogen complex.

  • Brendan C. Visser, MD

    Brendan C. Visser, MD

    Professor of Surgery (General Surgery)

    Current Research and Scholarly InterestsDr. Visser's research interests span the breath of his clinical practice. Areas of active research include the multidisciplinary treatment of pancreatic neuroendocrine cancers, technical aspects of minimally invasive pancreatic and liver surgery, and trends in the management of hepatobiliary cancers in California, focusing on socioeconomic and instituional barriers to appropriate care.

  • Peter Vitousek

    Peter Vitousek

    Clifford G. Morrison Professor of Population and Resource Studies and Professor of Earth System Science, Emeritus

    Current Research and Scholarly InterestsVitousek's research interests include: evaluating the global cycles of nitrogen and phosphorus, and how they are altered by human activity; understanding how the interaction of land and culture contributed to the sustainability of Hawaiian (and other Pacific) agriculture and society before European contact; and working to make fertilizer applications more efficient and less environmentally damaging (especially in rapidly growing economies)

  • Madalina Vlasceanu

    Madalina Vlasceanu

    Assistant Professor of Environmental Social Sciences and, by courtesy, of Organizational Development at the Graduate School of Business

    BioMadalina Vlasceanu is an Assistant Professor of Environmental Behavioral Sciences in the Department of Environmental Social Sciences at Stanford University’s Doerr School of Sustainability and the Director of the Climate Cognition Lab. Professor Vlasceanu is also a Faculty Fellow at the Stanford Center for Affective Science, the chair of the Society for Personality and Social Psychology at the United Nations, and a committee member of the Psychology Coalition at the United Nations, and the International Panel on the Information Environment. She obtained a PhD in Psychology and Neuroscience from Princeton University in 2021 and a BA in Psychology and Economics from the University of Rochester in 2016. Prior to Stanford, she was an Assistant Professor of Psychology at New York University. Her research focuses on the cognitive and social processes that give rise to emergent phenomena such as collective beliefs, collective decision-making, and collective action, with direct applications to climate policy. Guided by a theoretical framework of investigation, her research employs a large array of methods including behavioral laboratory experiments, social network analysis, field studies, randomized controlled trials, megastudies, and international many-lab collaborations, with the goal of understanding the processes underlying climate awareness and action at the individual, collective, and system level. Professor Vlasceanu's research is theoretically grounded and focused on applications for practice, incorporates an interdisciplinary perspective, and directly informs policies and practices relevant to climate mitigation and adaptation.

  • Amy Voedisch MD, MSCP

    Amy Voedisch MD, MSCP

    Clinical Associate Professor, Obstetrics & Gynecology - General

    BioDr. Voedisch was born and raised in a small town in Minnesota. She received a BA from Macalester College and attended Mayo Medical School. She completed a residency in Obstetrics and Gynecology at Kaiser Permanent Santa Clara and a Fellowship in Complex Family Planning at Stanford School of Medicine. She also has a Masters in Epidemiology and Clinical Science Research from Stanford University. Dr. Voedisch is a board certified Complex Family Planning physician and a certified menopause practitioner through The Menopause Society. Dr. Voedisch is passionate about providing comprehensive reproductive healthcare to all women at any stage in their lives. She specializes in contraception, abortion, perimenopause and menopause. Dr. Voedisch has a particular interest in international healthcare and serves as a consultant through the Stanford Program for International Reproductive Education and Services (SPIRES), providing medical education and quality assurance in family planning internationally. Dr. Voedisch believes strongly in shared-decision making between patients and their physicians in order to help all patients reach their health goals.