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Tracy E. Waasdorp, PhD, MEd

Tracy E. Waasdorp, PhD, MEd

Dr. Waasdorp translates child development theory and literature into prevention and intervention programming, trials, research methodology, and related statistics. Her goals are to reduce bullying and aggression, improve children’s social and emotional skills, and help adults promote children’s positive peer relationships.


Amy Waldman, MD, MSCE

Amy T. Waldman

Dr. Waldman works to understand metrics to quantify disease burden in acquired and genetic neurologic disorders that affect the white matter of the brain. She also focuses on clinical trial methodology to bring novel therapies to neurodegenerative diseases.


Douglas C. Wallace, PhD

Douglas C. Wallace

Dr. Wallace is a geneticist and evolutionary biologist who founded the field of mitochondrial medicine 40 years ago. He investigates the role of mitochondria in human evolution, health, and disease.


Kate E. Wallis, MD, MPH

Photo of Kate E. Wallis

Dr. Wallis explores socio-demographic disparities in the diagnosis of developmental disorders and autism spectrum disorder (ASD), and the process of screening for these conditions in pediatric primary care. She aims to develop and test strategies to improve developmental outcomes for all children and to bridge gaps in identification and care for low-income and minority children and girls with developmental delays and autism spectrum disorder.


Elizabeth Walshe, PhD

Elizabeth A. Walshe

Dr. Walshe's research uses cognitive, neuropsychological, and neuroscientific techniques to understand higher-level cognitive control over the complex and high-risk motor task of driving. In particular, Dr. Walshe investigates how cognitive development in young drivers may impact driver safety. 


Jennifer Walter, MD, PhD, MS

Jennifer Walter

Dr. Walter's research in the pediatric cardiac intensive care unit includes the customization of an interprofessional team and family-based intervention to improve communication about goals of care, and teamwork and evaluation of the intervention. Knowledge gained from this research will guide future interventions to improve outcomes for pediatric patients with advanced heart disease and their families.


Joy Wan, MD, MSCE

Joy Wan

Dr. Wan focuses her research on chronic inflammatory skin diseases, primarily atopic dermatitis and psoriasis. Through her work she aims to understand and address the health, social, and life impacts of chronic skin disease in children.


Kai Wang, PhD

Kai Wang

Dr. Wang's research focuses on the development of bioinformatics methods to improve the understanding of the genetic basis of human diseases, and the integration of electronic health records and genomic information to facilitate genomic medicine on scale.


Dah-Jyuu Wang, PhD

Dah-Jyuu Wang

Dr. Wang works on biomarker identification using multiparametric magnetic resonance imaging and homo- and hetero-nuclear spectroscopy techniques for pediatric disease research including  tumors, iron overload, cystic fibrosis, muscular dystrophy, autism, mitochondrial, Gaucher’s, and Canavan’s diseases.


Christopher G. Ward, MD

Christopher G. Ward, MD

Dr. Ward works to understand the possible long-term effects of anesthesia on the developing brain using both basic science and clinical studies. Clinically, he focuses on the anesthetic care of neurosurgical patients, patients with difficult airways, and patients with epidermolysis bullosa.


David R. Weber, MD, MSCE

David R. Weber

Dr. Weber is a clinical researcher focused on improving bone health in children. He is currently focused on investigating the effects of effects of type 1 diabetes and Duchenne muscular dystrophy on the skeleton. 


Jennifer Webster, DO, MSHP

Jennifer Webster

Dr. Webster is part of the Lustgarten Center for GI Motility and works to understand the underlying etiology of constipation in children. She also focuses on motility disorders and manometry studies for diagnosis.


Ari Weintraub, MD

Ari Y. Weintraub

Dr. Weintraub is interested in using data from the electronic health record for the purposes of quality improvement and optimization of the user experience. 


Anna K. Weiss, MD, MSEd

Anna K. Weiss, MD, MSEd

Dr. Weiss focuses on trainee assessment in the clinical learning environment, and on drivers of wellness and burnout in the workplace. She has a particular interest in understanding the intersection between trainee and educator identity and its impact on learners' personal and professional success.


Scott L. Weiss, MD, MSCE

Scott L. Weiss

Dr. Weiss' research focuses on epidemiology of pediatric sepsis and mitochondrial dysfunction in sepsis-associated organ injury. The driving hypothesis for his research is that alterations in mitochondrial bioenergetics contribute to organ injury and immune dysregulation in a subset of children with sepsis.


Pamela F. Weiss, MD, MSCE

Pamela F. Weiss

Dr. Pamela Weiss is an experienced academic pediatric rheumatologist with advanced training in clinical epidemiology and a focus on early diagnosis, accurate phenotyping, and targeted treatment of children with juvenile arthritis. Her research consists of a mixture of prospective interventional, prospective observational and retrospective large database-driven work.


Matthew D. Weitzman, PhD

Matthew D. Weitzman Headshot

Dr. Weitzman's research program aims to understand host responses to virus infection, and the cellular environment encountered and manipulated by viruses. He studies multiple viruses in an integrated experimental approach that combines biochemistry, molecular biology, genetics, and cell biology.


Andrew D. Wells, PhD

Andrew D. Wells

Dr. Wells studies the genetic, epigenetic, and transcriptional mechanisms that control T lymphocyte immunity and tolerance.


Brian R. White, MD, PhD

Brian R. White

Dr. White develops novel optical functional neuroimaging systems and algorithms to better understand pediatric neuronal injury. His research includes optical intrinsic signal imaging, diffuse optical tomography, and resting-state functional connectivity.


Steven R. Wiley, MBA

Steven R. Wiley

Oversees the daily operations that provide financial accounting support for externally funded as well as internally funded awards and contracts.


Steven M. Willi, MD

Steven M. Willi, MD

Dr. Willi's research focuses on therapeutics for type 1 and type 2 diabetes and he has performed a number of physiologic studies in the etiology and characterization of diabetes in children. His current studies include trials on the delay of progression of type 1 diabetes and a multicenter trial to examine the optimal therapeutics for type 2 diabetes in children.


Wendy Reed Williams, PhD

Wendy Williams

Advances CHOP’s education and research missions by working collaboratively to create a culture of learning, discovery, integrity, and innovation to ensure success of the next generation of scientific leaders in child health.


Flaura K. Winston, MD, PhD

Flaura K. Winston

Dr. Winston is a pediatrician, engineer, and public health researcher who established the scientific foundation behind new patents, products, programs, policies, and laws for injury. As a clinician-scientist/innovator, Dr. Winston leads CHOP's Innovation Ecosystem and released a free e-textbook, Academic Entrepreneurship for Medical and Health Scientist.


Bryan Wolf, MD, PhD

Bryan Wolf

Building upon Children’s Hospital of Philadelphia’s legacy as one of the preeminent pediatric research institutions in the world, Bryan Wolf, MD, PhD, Executive Vice President and Chief Scientific Officer, oversees implementation of an ambitious, faculty-led strategic plan to make the most of the Research Institute’s unique resources, infrastructure, intellect, and talent to conduct transformational research initiatives with the highest scientific integrity from bench to bedside.


Heather A. Wolfe, MD, MSHP

Heather A. Wolfe

Dr. Wolfe works to improve care delivered to critically ill children using quality improvement and implementation science frameworks. She's interested in improving the quality of cardiopulmonary resuscitation in children in the PICU, and in the prevention, identification, and treatment of delirium.


Adam J. Wolpaw, MD, PhD

Adam J. Wolpaw

Dr. Wolpaw works on inflammatory signaling in childhood solid tumors, particularly neuroblastoma. The hope is that understanding these pathways and how to modify them will allow us to rationally design approaches to enhance the efficacy of immunotherapies.


James C. Won, PhD

James C. Won

Dr. Won is the Human Factors Program Manager for the Center for Healthcare Quality and Analytics (CHQA), adjunct assistant professor for the Perelman School of Medicine and the School of Engineering at the University of Pennsylvania, and a senior fellow at the Center for Injury Research and Prevention.


Sarah M. Wood, MD, MSHP

Sarah M. Wood

Dr. Wood's research focuses on improving health service delivery to reduce HIV and STI incidence in adolescents and young adults. Her current projects examine improving uptake and adherence of HIV pre-exposure prophylaxis in sexual and gender minority youth, increasing STI and HIV screening in primary care, and identifying patient, neighborhood, and clinic-based barriers to HIV and sexual health service delivery.


Joanne N. Wood, MD

Joanne N. Wood

Dr. Wood is committed to improving outcomes for vulnerable children, especially abused and neglected children. Her current research also focuses on positive parenting interventions designed to support caregivers of young children and strengthen families.


G. Scott Worthen, MD

G. Scott Worthen

Dr. Worthen's research program focuses on the mechanisms of acute inflammation in the lung. For more than 30 years he has worked to develop concepts, tools, and approaches to understand how neutrophils are mobilized from the bone marrow, retained within pulmonary capillaries, and migrate into the lung parenchyma and airspaces.