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About the Speakers

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David Spain, MD, FACS

David A. Spain, MD, FACS, the current president of the AAST, is the David L. Gregg, MD Professor and Chief of Acute Care Surgery at Stanford University and the General Surgery Program Director.


Dr. Spain grew up in Michigan and obtained a Bachelor’s Degree in Biochemistry from the Honors College at Michigan State University. He attended Wayne State University Medical School, followed by general surgery residency at UMNDJ-Robert Wood Johnson. After that, he completed a 2-year fellowship at the University of Louisville in Trauma/Burns/Critical Care Surgery.

He has been at Stanford since 2001 where he has an active surgical practice in elective and acute care surgery. His research interests include trauma/surgical critical care, assessment of trauma system performance and PTSD following critical illness and injury.

Rachel Pardes Berger, MD, MPH

Rachel Berger, MD, MPH is Professor of Pediatrics at the University of Pittsburgh and chief of the division of Child Advocacy at UPMC Children’s Hospital of Pittsburgh in Pittsburgh, Pennsylvania, USA. She attended medical school at Columbia University, completed her pediatric internship and residency and a fellowship in general academic pediatrics at UPMC Children’s Hospital of Pittsburgh and received a Master’s in Public Health at the University of Pittsburgh.


In addition to her clinical work evaluating children with concerns for maltreatment, she has spent over 20 years as a clinical researcher. Her research focuses on decreasing fatalities and near-fatalities due to physical abuse in young children by improving identification of abuse using serum biomarkers, clinical decision rules and the electronic health record. She has co-authored over 100 peer-reviewed publications and book chapters and was the first child abuse pediatrician to be elected to ASCI, the American Society for Clinical Investigation.


She served on the Pennsylvania Task Force for Child Protection and as the research lead for the Federal Commission to Eliminate Child Abuse and Neglect Fatalities (CECANF) during the Obama administration. She was a senior policy fellow for Casey Family Programs in 2019 during which time she focused on improving collaboration between Child Protective Services and medical professionals. Since 2019, she has directed Project MAGICO – Medical Assessment Guidelines to Improve Child Outcomes – in Allegheny County, Pennsylvania, a model program of collaboration between CPS-medical professionals.


Steven L. Moulton, MD

Steven L. Moulton MD is a tenured Professor of Surgery at the University of Colorado School of Medicine. He directs the Pediatric Trauma and Burn Programs at Children’s Hospital Colorado, where he holds the Colorado Firefighter Endowed Chair for Burn and Trauma Care. 


He attended the University of Washington for his undergraduate (BA Russian 1982) and graduate degrees (MD 1986).  His surgical training was at the University of California, San Diego (General Surgery 1993) and the State University of New York, Brooklyn (Pediatric Surgery 1995).  He is board certified in General and Pediatric Surgery. His clinical areas of focus are pediatric trauma and burn surgery, however, his clinical interests span the field of pediatric general surgery.


His research in pediatric trauma, pediatric burn injuries and waveform analytics has been supported by $12M in funding from the NIH and the Department of Defense (US Army).  He is an inventor on four issued and 11 pending US patents. He has authored or co-authored more than 100 peer-reviewed publications and 15 book chapters. 

Michael L. Nance, MD

Dr. Nance is the Josephine J. and John M. Templeton, Jr.  Professor of Pediatric Surgery at the University of Pennsylvania where he has had a career long interest in trauma. Dr. Nance began his medical career in New Orleans at Louisiana State University medical school and would go on to complete his general surgery residency and a critical care fellowship at the University of Pennsylvania.


Finally, Dr. Nance completed his pediatric surgical training at the Children’s Hospital of Philadelphia where he is now and attending surgeon and the Director of the Pediatric Trauma Program. Dr. Nance has research interests focused on issues such as pediatric firearm injury, solid organ injury, access to trauma care.  


Dr. Nance has held leadership positions in local and regional organizations as well as nationally in the American Pediatric Surgical Association (chair, Trauma Committee), Eastern Association for the Surgery of Trauma (Board Member; chair, Pediatric Trauma Committee), and the American College of Surgeons-Committee on Trauma (Member Executive Committee; chair Quality, Data and Research Committee). Dr. Nance currently serves as the President of the Pediatric Trauma Society.

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Christopher C. Stewart, MD, FAAP

Christopher C. Stewart, MD, FAAP, is a Professor of Pediatrics at UCSF, and board certified in child abuse pediatrics. Dr. Stewart received his BA from Yale, his MD degree from Harvard University and completed his residency training in pediatrics at UCSF. He is a pediatric hospitalist at San Francisco's only trauma center, is director of the Stanford/LPCH Suspected Child Abuse and Neglect (SCAN) Team, and the UCSF Mission Bay Child Protection Center.  


Dr. Stewart consults on child abuse cases for several Bay Area County hospitals, as well as consultation and testifying for Child Protective Services and District Attorney’s offices. Dr. Stewart co-directs a child abuse rotation for medical students, residents and fellows at Stanford/LPCH and UCSF.  As community service, he co-directs the Child Death Review Team for San Francisco County and sits on numerous regional county committees and CBOs related to child abuse and neglect. 


He is a member of the Ray Helfer Society, an honorary society of physicians seeking to provide leadership to enhance the prevention, diagnosis, and treatment of child abuse and neglect. Dr. Stewart has also been PI on several federally and state funded international research training grants. Dr. Stewart has been involved in many international projects, for which he was awarded the UCSF Chancellor’s Award for public service, has received several teaching awards, and has provided lectures and training in international settings, including training in the Eastern Democratic Republic of Congo and recently to Syrian doctors documenting torture cases.

Garen J. Wintemute, MD, MPH

Dr. Wintemute is Distinguished Professor of Emergency Medicine and Baker–Teret Chair in Violence Prevention at the University of California, Davis. He is the founding director of the Violence Prevention Research Program there and of the California Firearm Violence Research Center, the nation’s first publicly-funded center for research in this field.


He was among the first to study firearm violence as a public health problem, and firearm violence remains the primary focus of his research and policy work. He practices and teaches emergency medicine at UC Davis Medical Center. His current research focuses on violence risk factors and interventions to prevent violence. Trained initially as a biologist at Yale University, Dr. Wintemute attended medical school and residency at UC Davis and studied epidemiology and injury prevention at The Johns Hopkins University.

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Rajiv Iyer, MD

Rajiv Iyer, MD is an Assistant Professor of Neurosurgery at the University of Utah/Primary Children’s Hospital. He is a dual fellowship-trained pediatric neurosurgeon with a special focus on pediatric spinal disorders and spasticity.

Dr. Iyer attended medical school at NYU School of Medicine and completed a residency in neurological surgery at The Johns Hopkins Hospital. He then completed a pediatric neurosurgery fellowship at University of Utah/Primary Children’s Hospital and went on to complete the Advanced Pediatric Spinal Deformity Fellowship in the Department of Orthopedic Surgery at Columbia University Medical Center in New York.


Dr. Iyer’s clinical interests lie in the treatment of all pediatric spine conditions, including pediatric spinal deformity, congenital anomalies of the spine, spinal trauma, spine and spinal cord tumors, and craniocervical junctional disorders. He is involved in several national research initiatives to better understand and improve the treatment of pediatric spinal conditions and to enhance the safety of complex spinal surgery in children. 

David Listman, MD

Dr. David Listman received his medical degree from Temple University in Philadelphia and completed residency in Pediatrics and fellowship in Pediatric Emergency Medicine from Yale- New Haven Children's Hospital in New Haven, CT.


He worked in both community and tertiary care settings in New York City prior to coming to Colorado. Dr. Listman is the medical director of the Emergency Department at CHCO Colorado Springs and an Associate Professor of Pediatrics at the University of Colorado School of Medicine. 

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Antonia Chiesa, MD

Antonia Chiesa is an Associate Professor of Pediatrics at the University of Colorado School of Medicine. She is an attending on the Kempe Child Protection Team at Children's Hospital Colorado, and Director of Integrated Healthcare Operations and Services at the Kempe Center for the Prevention and Treatment of Child Abuse and Neglect.