School of Medicine
Showing 301-350 of 562 Results
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Estephannie Alvarez
Assistant Clinical Research Coordinator, Dermatology
Current Role at StanfordAssistant Clinical Research Coordinator
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Ruben Alvero, M.D.
Clinical Professor, Obstetrics & Gynecology - Reproductive Endocrinology & Infertility
BioDr. Ruben Alvero is Professor of Obstetrics and Gynecology at Stanford Medical School and is the Division Director of Reproductive Endocrinology and Infertility at the Lucille Packard Children’s Hospital. He is Board Certified in Obstetrics and Gynecology and in Reproductive Endocrinology and Infertility. He is a fellow of the American College of Obstetrics and Gynecology and the American College of Surgeons.
Following undergraduate training at Harvard College (BA, Economics, 1980), Dr. Alvero received his medical degree from the Uniformed Services University of the Health Sciences in Bethesda, Maryland in 1986. He completed his residency in Obstetrics and Gynecology at Walter Reed Army Medical Center (1990) and a fellowship in Reproductive Endocrinology and Infertility at the National Institutes of Health (NIH, 1995).
Dr. Alvero was the Division Director for Infertility Services at the National Naval Medical Center (Bethesda) and Walter Reed Army Medical Center and faculty in the NIH-sponsored fellowship in Reproductive Endocrinology and Infertility. Dr. Alvero remained a reserve Colonel in the U.S. Army Medical Corps until 2012 and during 27 years in the Army was mobilized several times for missions around the world, including service in Iraq, Kuwait, Mongolia, Germany and various locations in the United States.
Dr. Alvero was Professor of Obstetrics and Gynecology and Vice Chair for Education at the University of Colorado Health Sciences Center and the Director of the Assisted Reproductive Technologies, and founding member of the Center for Surgical Innovation. Dr. Alvero was Residency Program Director in Obstetrics and Gynecology at the University of Colorado. He was subsequently Division and Fellowship Director at Brown University.
The Council in Residency Education in Obstetrics and Gynecology awarded him its National Faculty Award for Excellence three times. He has been NIH-funded, most recently as part of the Reproductive Medicine Network.
Dr. Alvero is currently the Vice President of the Society for Reproductive Endocrinology, the national organization of fertility specialists and will take over as President in October 2020.
Dr. Alvero’s clinical interests include IVF, polycystic ovary syndrome, endometriosis and robotic surgery. Dr. Alvero’s research interests include non-invasive evaluation of embryo quality, cost-effectiveness analysis, and the role of critical thinking in medical education. A fluent Spanish-speaker, Dr. Alvero is also dedicated to improving the health of the Latinx community.
Dr. Alvero is happiest on the water, whether sailing or singles rowing. He is also constantly attempting to improve his mastery of Latin American cuisine. Most of all, he loves spending time with his family. -
Jurgis Alvikas
Clinical Assistant Professor, Surgery - General Surgery
BioDr. Jurgis Alvikas was born in Lithuania and moved to Chicago as a teenager. He graduated magna cum laude from the University of Illinois at Urbana–Champaign with a degree in Molecular and Cellular Biology and earned his M.D. from the University of Illinois at Chicago College of Medicine, where he was inducted into Alpha Omega Alpha. He then completed his General Surgery residency and a fellowship in Complex General Surgical Oncology at the University of Pittsburgh Medical Center.
He is passionate about caring for patients with hepato-biliary and gastrointestinal malignancies and about mentoring surgical trainees. Outside of medicine, he enjoys running, reading, and spending time with his family. -
Jennifer Alyono, MD, MS
Clinical Associate Professor, Otolaryngology (Head and Neck Surgery)
BioDr. Alyono completed her undergraduate degree in Chemistry as well as her master’s degree in Bioengineering at Stanford University. After completing medical school at the University of California, San Diego, she returned to Stanford where she completed both her residency in Otolaryngology-Head & Neck Surgery, as well as her fellowship in Otology/Neurotology and Skull base surgery. Clinically, Dr. Alyono specializes in adult and pediatric surgery for disorders of the middle ear, inner ear, ear canal, facial nerve, and skull base. This includes care for hearing loss, tympanic membrane perforations, cholesteatoma, glomus tumors, and vestibular schwannomas, among others. Her research interests lie in hearing in population health, quality of care, and technology in medicine.
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Zainab (Zaina) Alzawad
Clinical Assistant Professor, Emergency Medicine
BioDr. Zaina Alzawad is a clinical strategist with extensive experience advancing patient care through research, data-driven innovation, and interdisciplinary collaboration. She currently serves as a Clinical Development and Data Strategy Consultant in the Emergency Department at Stanford Health Care, where she leads and supports research and quality initiatives aimed at improving care delivery, operational efficiency, and clinical outcomes.
Dr. Alzawad’s research background is grounded in pediatric intensive care, with a growing focus on emergency care systems and innovation. She brings specialized expertise in psychometrics, quantitative and qualitative methodologies, and healthcare data analysis, supported by advanced training in measurement, statistics, and nursing science. She previously served as a Nurse Scientist at Stanford Health Care, where she led interdisciplinary studies and mentored clinical teams in research and evaluation. Driven by a passion for inquiry and impact, Dr. Alzawad actively mentors interdisciplinary teams and contributes to the design, implementation, and dissemination of studies that inform clinical practice. -
Derek F. Amanatullah, M.D., Ph.D.
Associate Professor of Orthopaedic Surgery
BioDerek F. Amanatullah, M.D., Ph.D., is an internationally recognized expert in hip and knee replacement. He helps patients with advanced arthritis and complex joint problems regain mobility and confidence. In addition to primary hip and knee replacements, he is frequently sought out for difficult revision surgeries, often fixing complications such as infection, instability, or persistent pain from prior procedures.
Dr. Amanatullah focuses on what truly lowers surgical risk: the skill, preparation, and coordination of the surgical team. He believes patients deserve care that relies on evidence and expert technique rather than placing the burden solely on weight or other patient factors. This patient-centered approach was highlighted by The New York Times.
As a researcher, he discovered an important new way certain infections can remain “hidden” in the body, shaping how surgeons diagnose and treat joint infections. His impact on the field earned him induction into The Knee Society, an honor held by fewer than 200 surgeons worldwide. Patients choose Dr. Amanatullah for his precision, innovation, and commitment to providing the safest, most effective joint care possible. -
Michelle Ameri, BA, RVT
Affiliate, Pediatrics - Cardiology
BioMichelle received a BA in Biology from the University of North Carolina at Asheville. Immediately after graduation, she entered the veterinary field as an assistant and thrived in the field, eventually receiving her Registered Veterinary Technician license in 2001. Prior to working at Stanford, she was the head nurse at Peninsula Equine Medical Center in Menlo Park where her duties included everything from front office work to ICU patient care to administering and monitoring anesthesia on 1000+ lb horses. She also has been an Adjunct Instructor at Foothill College in Los Altos, CA for the Veterinary Technician Program.
Since joining the Rabinovitch-Bland Lab in 2004, her role has been overseeing the day-to-day needs of the laboratory and staff. In addition to providing administrative support to the PI's and researchers, she oversees the financial and regulatory aspects of our program. Michelle really enjoys being part of a team. Her 25+ years in the veterinary field has made her proficient at working with doctors, students, and staff members. Her degree and background in the medical field are useful tools to bring to the table, and she prides herself on being proactive, organized, and having a positive attitude. When not at Stanford, you can find her at the beach, hiking with her dog, or riding her horse. -
Manuel R. Amieva
Professor of Pediatrics (Infectious Diseases) and of Microbiology and Immunology
Current Research and Scholarly InterestsMy laboratory studies how bacteria colonize our bodies for long periods of time, and how interactions between bacteria and the epithelial surfaces of the gastrointestinal tract and skin may lead to disease. Epithelial surfaces are the first barrier against infection, but they also where our bodies meet and co-evolve with the microbial world.. Several of our studies have focused on the epithelial junctions as a target for bacterial pathogens. The host epithelium uses its epithelial junctions to form a tight but dynamic barrier with an external surface that is inhospitable to microbial attachment, secretes anti-microbial compounds, and has a rapid rate of self-renewal. The balance in the microbe-epithelial relationship results in silent commensalism or symbiosis; an imbalance results in diseases ranging from acute bacterial invasive disease to chronic ulcers or carcinoma.
Our laboratory has developed novel microscopy applications such as quantitative 3D confocal microscopy, electron microscopy, time-lapse imaging, microinjection and micromanipulation to visualize the interaction of pathogens with epithelial cells in culture and in animal and human tissues. Many of out studies focus on the gastric pathogen Helicobacter pylori, but we have also expanded our investigations to include the intestinal pathogens Listeria monocytogenes and Salmonella enterica, and the skin pathogen and colonizer Staphylococcus aureus. I believe that elucidating how microbes communicate with and alter our epithelial cells at a molecular level will be important for finding novel therapeutic targets to control mucosal colonization and prevent invasive disease.
Using this perspective, we have uncovered several novel concepts of how bacteria colonize and breach our epithelial surfaces. For example, we discovered that Helicobacter pylori target the intercellular junctions, and in particular that the virulence factor CagA affects junction assembly and cell polarity. This confers H. pylori the ability to extract nutrients and grow directly on the epithelial surface. We also found that these properties of CagA have consequences for cellular transformation of the epithelium. For instance, we showed that H. pylori affect the activity and state of epithelial stem cells in the stomach by colonizing the epithelial surface deep in the gastric glands. This gland-associated population is essential for pathological inflammation and hyperplasia in animal models, and confers significant colonization advantages to the bacteria. Our Listeria research uncovered a new mechanism and site where bacteria can breach the gastrointestinal epithelial barrier to invade. We found that Listeria find their receptor for invasion at sites of epithelial senescence, where the epithelial junctions undergo dynamic turnover. To study Salmonella and H. pylori we have developed a human organoid model to study their interactions with human gut epithelium in vitro. To study Staphylococcus aureus pathogenesis, we have developed methods to visualize infection at the scale of a single bacterial microcolony using an organoid culture system of human keratinocytes and fibroblasts that grow into a 3D skin-equivalent. We recently identified several proteins at the eptithelial junctions as host factors involved in the pathogenesis of one of Staphylococcus aureus major toxins. -
Maryam Amirahmadi
Postdoctoral Scholar, Cardiovascular Medicine
BioDr. Maryam Amirahmadi is a microsurgery expert and postdoctoral research fellow at Stanford Cardiovascular Institute. She obtained her Doctor of Medicine (MD) degree from Hamadan University of Medical Sciences. After more than a year of experience as a Family and Emergency Physician, she spent around 4 years at the Department of Cardiovascular Surgery of Shiraz University of Medical Sciences where she served as a pediatric and adult Cardiac Intensive Care physician and received training in cardiovascular surgery at Namazi and Faghihi hospitals. She then spent a year in the Department of Vascular Surgery at the University of Miami, Miller School of Medicine, serving as a postdoctoral researcher and performing microsurgery on animals, with her research focused on therapeutic strategies to improve neovascularization after limb ischemia. Dr. Amirahmadi joined Stanford Cardiovascular Institute in 2022 where she is now a postdoctoral research fellow under the supervision of Prof. Philip S. Tsao, a renowned cardiovascular scientist. Her research interests and practical expertise include Microsurgery, and the effect of e-cigarette vaping on factors of inflammatory or immune pathways that can subsequently be related to the molecular mechanisms involved in angiogenesis and arteriogenesis in the murine model of hindlimb ischemia, as well as the mechanisms of e-cigarette and nicotine’s effects in augmenting Abdominal Aortic Aneurysm (AAA) in rodent models of aortic aneurysm, including porcine pancreatic elastase-induced AAA. Dr. Maryam Amirahmadi and her colleagues are currently investigating the transgenerational effects of vaping/nicotine on abdominal aortic aneurysm (AAA) risk.
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Daniel Kwasi Amponsah
Affiliate, Department Funds
Fellow in Medicine - Med/Cardiovascular MedicineBioDr. Daniel Amponsah was born and raised in Loma Linda, California. He graduated with a BS in Biochemistry from Pacific Union College in Northern California and received his MD from Loma Linda University School of Medicine where he graduated AOA. He completed his internal medicine residency at Massachusetts General Hospital and was appointed the Simulation Chief his senior year. He is interested in pursuing an academic career in interventional cardiology with a focus on outcomes and health disparities. Prior research work has explored outcomes in ischemic time in patients with cardiogenic shock and STEMI with Dr. Anthony Hilliard, disparities in the management of aortic stenosis alongside Dr. Sammy Elmariah, defining type 2 MI using coronary CT with Dr. James Januzzi. He is presently engaged in assessing the potential applications of angiography-derived FFR and IMR across various coronary disease syndromes with Dr. Bill Fearon and investigating disparities in advanced structural interventions with Dr. Celina Yong.
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Michael Amylon
Professor of Pediatrics (Hematology/Oncology) at the Lucile Salter Packard Children's Hospital, Emeritus
Current Research and Scholarly InterestsBone marrow transplantation (BMT) is a treatment modality which is being broadly applied to a growing number of disorders. Increasing success with BMT is offering improved survival to pediatric and adult patients with acute leukemia, chronic leukemia, lymphomas, and a variety of solid tumors as well as severe aplastic anemia.
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Kanwaljeet S. Anand
Professor of Pediatrics (Pediatric Critical Care) and of Anesthesiology, Perioperative and Pain Medicine
On Partial Leave from 11/01/2025 To 03/31/2026Current Research and Scholarly InterestsDr. Anand is a translational clinical researcher who pioneered research on the endocrine-metabolic stress responses of infants undergoing surgery and developed the first-ever scientific rationale for pain perception in early life. This provided a framework for newer methods of pain assessment, numerous clinical trials of analgesia/anesthesia in newborns, infants and older children. His research focus over the past 30+ years has contributed fundamental knowledge about pediatric pain/stress, long-term effects of pain in early life, management of pain, mechanisms for opioid tolerance and withdrawal. Current projects in his laboratory are focused on developing biomarkers for repetitive pain/stress in critically ill children and the mechanisms underlying sedative/anesthetic neurotoxicity in the immature brain. He designed and directed many randomized clinical trials (RCT), including the largest-ever pediatric analgesia trial studying morphine therapy in ventilated preterm neonates. He has extensive experience in clinical and translational research from participating in collaborative networks funded by NIMH, NINDS, or NICHD, a track-record of excellent collaboration across multiple disciplines, while achieving success with large research teams like the Collaborative Pediatric Critical Care Research Network (CPCCRN). He played a leadership roles in CANDLE (Condition Affecting Neuro-Development & Learning in Early infancy) and other activities of the Urban Child Institute and UT Neuroscience Institute. More recently, he led the NeoOpioid Consortium funded by the European Commission, which collected data from 243 NICUs in 18 European countries.
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Shivesh Anand
Postdoctoral Scholar, Cardiothoracic Surgery
BioDr. Shivesh Anand is an NWO Rubicon Postdoctoral Fellow in the Department of Cardiothoracic Surgery at Stanford University, specializing in tissue engineering and regenerative medicine. He completed his PhD at the MERLN Institute (Maastricht, Netherlands), where he applied biomaterials, biofabrication, and biomodulation strategies to develop nano-engineered scaffolds for tympanic membrane regeneration. His global research trajectory is deeply interdisciplinary, including research appointments at Harvard-MIT Health Sciences and Technology (United States), A*STAR (Singapore), IBEC Barcelona (Spain), and Aarhus University (Denmark). Currently focused on active regenerative engineering, he investigates how multimodal biophysical cues modulate cell fate and tissue regeneration.
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Shuchi Anand
Associate Professor - University Medical Line, Medicine - Nephrology
Current Research and Scholarly InterestsManagement of CKD and ESRD in low-resource settings
Tubulointerstitial disease
Chronic kidney disease of unknown etiology
ESRD and physical activity
ESRD and vitamin D deficiency -
Nidharshan Anandasivam
Affiliate, Department Funds
Fellow in Medicine - Med/NephrologyBioNidharshan Anandasivam is a fellow in the Stanford University Nephrology Fellowship Program. He received a Bachelor of Science in Biological Engineering at MIT, an MD from Yale School of Medicine, and an MBA from Yale School of Management. He completed his Internal Medicine Residency at University of Texas at Austin Dell Medical School.
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Christine Anastasiou, MD, MAS
Clinical Assistant Professor, Medicine - Immunology & Rheumatology
BioDr. Anastasiou is a board-certified, fellowship-trained rheumatologist with the Stanford Health Care Immunology and Rheumatology Clinic. She is also a clinical assistant professor in the Department of Medicine, Division of Immunology and Rheumatology at Stanford University School of Medicine.
Dr. Anastasiou specializes in diagnosing and treating patients with rheumatic diseases. She has a special interest in ankylosing spondylitis, systemic lupus erythematosus, rheumatoid arthritis, and idiopathic inflammatory myopathies.
Her scholarly work includes epidemiologic studies and clinical trials focused on improving safety and health outcomes for people with chronic rheumatic diseases. Dr. Anastasiou has served as an investigator and collaborator for clinical trials of new therapies to treat rheumatic disease. She is actively involved in medical education through developing and leading patient, medical student, resident, and fellow educational programs.
Dr. Anastasiou is a member of the American College of Rheumatology (ACR). She has published her research in peer-reviewed journals, including Arthritis Care & Research and Lupus Science & Medicine. She has delivered lectures and presentations across the country and abroad on various topics related to rheumatology.
