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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.


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.


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.


Tracy E. Waasdorp, PhD, MEd

Tracy E. Waasdorp

Dr. Waasdorp's research focuses on bullying prevention/intervention, forms of bullying, aggression, and victimization (e.g. relational aggression, cyberbullying). She examines coping with bullying, teacher and parent perceptions and responses to bullying, bystander behaviors, and overall school climate. Based on this work, she collaborates on developing and validating school-based programming that focuses on improving peer relationships and reducing all forms of bullying.


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.


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.


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.


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.