Wednesday, May 13, 2026
9:00 am
How Neighborhoods Shape Overdose Risk: Evidence from Spatial and Quasi-Experimental Studies
Wednesday, May 6, 2026
9:00 am
Evaluating the Effect of Deprescribing Antimuscarinic Overactive Bladder Medications on Cognitive Function and Quality of Life of Individuals with Parkinson Disease using a Pharmacist-led Series of N-of-1 Trials
Ashkan Ertefaie, PhD

Ashkan Ertefaie, PhD

Ashkan Ertefaie is an Associate Professor of Biostatistics at the University of Pennsylvania whose research focuses on developing robust, efficient, and data-adaptive statistical methods with minimal reliance on restrictive modeling assumptions. His work integrates modern machine learning with valid statistical inference and spans causal inference, individualized treatment strategies, instrumental variable methods, high-dimensional data analysis, post-selection inference, and survival analysis. He has served as principal investigator or contact PI on multiple NIH-funded projects, leading methodological advances in areas such as air pollution and cardiovascular disease, just-in-time adaptive interventions for substance use, personalized treatment strategies for Parkinson’s disease, and compliance-adjusted analyses in sequential treatment settings. His research is motivated by important public health and clinical questions and aims to produce practical tools for precision medicine and policy-relevant decision making.

Angela Aherrera, DrPH, MPH

Angela Aherrera, DrPH, MPH

Angela Aherrera is an Assistant Professor of Epidemiology at the Perelman School of Medicine at the University of Pennsylvania. She completed her undergraduate degree from Johns Hopkins University and received her doctoral and post-doctoral training at the Johns Hopkins Bloomberg School of Public Health. As an environmental epidemiologist, her research focuses on environmental hazards and understanding their role in the development of adverse cardiopulmonary outcomes.

Dr. Aherrera’s main research project investigates the exposure and toxicity of chemical constituents of concern, namely metals and aldehydes, in electronic cigarettes (e-cigarettes) that are popularly used among youth and young adults. She is currently enrolling participants to examine the impact of vaping as well as the role that these chemicals play on respiratory health. Findings from her study may inform the FDA in reducing unwanted chemical exposure and preventing nicotine addiction and other negative health effects from vaping.

Other research interests of hers include airborne microplastics. She was awarded NIOSH pilot funding and is currently assessing occupational exposures to microfibers, the most dominant type of microplastic in the environment, among garment industry workers. Future work includes method development of microfibers representative of what is seen in indoor environments and how inhalation of these hazards impacts the general population, namely children and pregnant women.

Dr. Aherrera is on the Early Career Researcher Initiative Advisory Panel of Environmental Health Perspectives (EHP) and is a member of the NIEHS funded Center for Excellence in Environmental Toxicology (CEET). She is also a member of the International Society for Environmental Epidemiology (ISEE), International Society of Exposure Science (ISES), and the Society for Research on Nicotine and Tobacco (SRNT).

Yuqing (Madison) Zhang, MD, MSc, PhD

Yuqing (Madison) Zhang, MD, MSc, PhD

Dr. Yuqing (Madison) Zhang is a physician and clinical epidemiologist (M.D., M.Sc., Ph.D.) with over 15 years of experience advancing evidence synthesis, guideline development, and randomized trials in both integrative and conventional medicine. She is an Associate Professor in the Department of Oral and Maxillofacial Surgery at the University of Pennsylvania School of Dental Medicine, part-time Associate Professor in the Department of Health Research Methods, Evidence, and Impact at McMaster University, Canada, and Honorary Associate Professor at the University of Nottingham Ningbo China. She is also a Senior Fellow at Penn's Leonard Davis Institute of Health Economics.


With over 80 peer-reviewed publications. She has collaborated globally with the WHO, American College of Physicians, America Thoracic Society, America Society of Hematology, The world Federation of Acupuncture-Moxibustion societies among others. Notably, she led the BMJ Acupuncture collection, a landmark international series uniting 100+ scientists from 40+ organizations to provide critical methodological guidance that informs clinical practice, reimbursement, and policy decisions.


Dr. Zhang's work bridges research creation, synthesis, and implementation into clinical practice and policy worldwide. She has trained over 600 clinicians, researchers, and graduate students in evidence synthesis and guideline methodology, and serves on the editorial boards of multiple journals.

Wednesday, April 29, 2026
9:00 am
Hotter Cities, Older Populations: Understanding and Responding to Converging Challenges in the 21st Century
Wednesday, April 22, 2026
9:00 am
Application of Artificial Intelligence Tools to Observational Data for the Study of Steatotic Liver Disease
Wednesday, April 1, 2026
9:00 am
Optimizing Mass Vaccination Campaigns for Epidemic—and Rabies—Prevention: A Stepped Wedge Cluster Randomized Trial
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