Stanford University
Showing 13,961-13,980 of 35,033 Results
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Tim Joehnk
Affiliate, Medicine - Med/Stanford Prevention Research Center
BioTim Joehnk works at the intersection of innovation, partnerships, and real-world application, with a focus on health, life sciences, and regulated industries. His work centers on connecting ideas with the environments in which they can take shape, bringing together perspectives from academia, industry, and entrepreneurship. At Stanford, he works with Emergence, a program that supports the development of early ideas into meaningful applications through collaboration and practical exploration.
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Ramesh Johari
Professor of Management Science and Engineering, Senior Fellow at the Stanford Institute for Human-Centered Artificial Intelligence (HAI) and, by courtesy, of Electrical Engineering
BioJohari is broadly interested in the design, economic analysis, and operation of online platforms, as well as statistical and machine learning techniques used by these platforms (such as search, recommendation, matching, and pricing algorithms).
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David Thomas John
Undergraduate, Vice Provost for Undergraduate Education
BioHi! My name is David John from San Diego, California. I am an Economics major (hopefully), and I am especially interested in Economics in relation to History. During High school, I researched the economic and political impact of California's Alien Land Laws on the different Asian ethnic groups that were primarily targeted by these laws, as I felt that this was a dark and impactful period in the History of California that not many of my peers or the general public are aware of. In my free time, I love to hang out with my friends, try new food, and play lacrosse.
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Esther M. John
Professor (Research) of Epidemiology and Population Health, Emerita
Current Research and Scholarly InterestsDr. John has extensive expertise in conducting population-based epidemiologic studies and has led as Principal Investigator multiple large-scale studies, including multi-center studies with a study site in the San Francisco Bay Area with its diverse population. Many of her studies and collaborations investigated cancer health disparities. Her research has focused on the role of modifiable lifestyle factors (e.g., body size, physical activity, diet), hormonal factors, early-life exposures, genetic variants, and gene-environment interactions; differences in risk factors by race and ethnicity, breast cancer subtypes, and prostate cancer subtypes; risk factors for familial breast cancer and second primary breast cancer, as well as prognostic factors related to survival disparities.
As Principal Investigator, Dr. John has led a number of studies conducted in the San Francisco Bay Area, including:
- the Northern California site of the Breast Cancer Family Registry, an on-going prospective multi-generational cohort of over 13,000 families established in 1995 at six international sites;
- the San Francisco Bay Area Breast Cancer Study, a population-based case-control study in nearly 5,000 African American, Hispanic, and non-Hispanic White women that investigated the role of modifiable lifestyle factors and other risk factors;
- the California site of the Breast Cancer Health Disparities Study that investigated genetic variability and breast cancer risk and survival in Hispanic and non-Hispanic White populations in the context of genetic admixture;
- the Breast Cancer Etiology in Minorities (BEM) Study, a pooled analysis of risk factors for breast cancer subtypes in minoritized racial and ethnic populations;
- the Northern California site of the WECARE Study that investigates risk factors for second primary contralateral breast cancer;
- the Second Primary Breast Cancer Disparities Study, a pooled analysis of risk factors for contralateral and ipsilateral second primary breast cancer in a diverse population;
- the San Francisco Bay Area Prostate Cancer Study, a population-based case-control study of lifestyle and genetic risk factors for advanced and localized disease.
These studies collected and pooled extensive data and biospecimens and continue to support numerous ancillary studies, collaborations and international consortia and have contributed to a better understanding of cancer risk and survival in minoritized racial and ethnic populations.
Dr. John is a founding PI of the LEGACY Girls Study, a prospective cohort established in 2011 that investigates early life exposures in relation to pubertal development outcomes, breast tissue characteristics, and behavioral and psychosocial outcomes in the context of having a family history or breast cancer.
In 2023, Dr. John joined the Stanford investigator team of the MOSAAIC (The Multiethnic Observational Study in American Asian and Pacific Islander Communities) Study, a five-center study to improve health of American Asian, Native Hawaiian, and Pacific Islander populations. -
Roy Mattathu John, MD, PhD, FRCP
Clinical Professor, Medicine - Cardiovascular Medicine
BioDr. John is a fellowship-trained cardiologist with more than 25 years of experience. He is a clinical professor in the Department of Medicine at Stanford University School of Medicine.
He originally earned board certification in clinical cardiac electrophysiology in 1996 and has continued to recertify. He also has earned board certification in cardiovascular disease and internal medicine.
Dr. John diagnoses and manages all forms of cardiac arrhythmias including atrial fibrillation and ventricular arrhythmias. His special interests include catheter ablation for SVT, atrial arrhythmias, pacemaker and defibrillator implants, and lead extraction.
He has conducted extensive research. He has participated in large multi-center clinical trials, including over 30 studies as a primary investigator of drugs, devices, and ablation techniques. He helped pioneer a new way to manage scar-related ventricular tachycardia. He also helped develop innovations in cardiac pacemaker technology.
Dr. John has authored over 200 publications that include 126 original research papers. They have appeared in reputed journals such as the New England Journal of Medicine, Circulation, Lancet, Journal of the American College of Cardiology, European Heart Journal, Heart Rhythm, Journal of Cardiovascular Electrophysiology, and many more. Topics have included innovative, new techniques and technologies for the treatment of supraventricular arrhythmias, atrial fibrillation, ventricular tachycardia, catheter ablation, lead extraction, cardiac pacing, and defibrillation.
He was a member of the editorial board for Circulation and is currently on the editorial board of the publications Heart Rhythm Journal, Arrhythmia and Electrophysiology, Journal of Cardiac Electrophysiology, and Journal of Innovations in Cardiac Rhythm Management.
Dr. John also has written several chapters for medical textbooks such as Harrison’s Principles of Internal Medicine, Zipes Textbook on Cardiac Electrophysiology - Cell to Bedside, Conn’s Current Therapy, Electrical Disorders of the Heart, Cardiac Mapping, and many more.
He has made invited presentations to his peers at scientific sessions of the Heart Rhythm Society, American Heart Association, American College of Cardiology, and Heart Failure Society. He has delivered more than 60 national and international lectures. Subjects include cardiac pacing, defibrillation, heart failure, and arrhythmia management including catheter ablation for arrhythmias.
Dr. John is a fellow of the American College of Cardiology, Heart Rhythm Society, and Royal College of Physicians of London.
He has volunteered his time and expertise to provide free cardiac care to underserved patients in Bolivia, India, and Kenya.
