1. Assistant Professor, Department of Pediatrics, The George Washington University School of Medicine and Health Sciences
2. Instructor, Department of Pediatrics, The George Washington University School of Medicine and Health Sciences
3. Research Division Chief, Center for Translational Research, Children's National Hospital; Associate Professor, Department of Pediatrics, The George Washington University School of Medicine and Health Sciences
4. Associate Professor, Division of Military Child and Family Research, Department of Pediatrics, Uniformed Services University of the Health Sciences F. Edward Hébert School of Medicine