Diego Preciado, MD, PhD

George Zalzal, M.D., is professor of Otolaryngology and Pediatrics with tenure at the George Washington University and emeritus chief of the Division of Pediatric Otolaryngology at Children’s National Hospital in Washington, D.C.

Marc DiFazio, M.D., is the Vice President ofambulatory Services at Children’s National Hospital. He completed his pediatric and neurology training at Walter Reed Army Medical Center, and went on to become the Chief of Child Neurology at Walter Reed, where he served on active duty until 2005 before transitioning to private practice in Rockville, MD.

Laura L. Tosi, M.D., is an orthopaedic surgeon and the director of the Bone Health Program at Children’s National Hospital. Her practice focuses on orthopaedic management of children with physical disabilities and birth defects. Dr. Tosi also works to increase physician awareness of bone health issues for women and children, with the goal of reducing debilitating bone injury as the population ages. Dr. Tosi also treats children and adults with spina bifida and other congenital orthopaedic problems.