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Leslie Castelo-Soccio, MD, PhD received her undergraduate degree from Harvard University and her medical and doctoral degrees from the Tri-Institutional MD-PhD program at Cornell University. After training in dermatology at the University of Pennsylvania, she completed a pediatric dermatology fellowship at the Children's Hospital of Philadelphia and a postdoctoral fellowship in hair and pigment disorders at the University of Pennsylvania. From 2011-2021, Dr. Castelo-Soccio was an assistant professor of pediatrics and dermatology at the University of Pennsylvania Perelman School of Medicine and the research director and an attending physician in pediatric dermatology at the Children's Hospital of Philadelphia. In 2021, she joined the National Institute for Arthritis and Musculoskeletal and Skin diseases at the National Institutes of Health as a staff clinician and research physician. Dr. Castelo-Soccio's research covers the natural history of alopecia including epidemiology, associated comorbidities, and response to therapy. She specializes in imaging tools and guidelines for pediatric alopecia. Dr. Castelo-Soccio also studies the microbiome of hair disorders with the goal of developing therapies targeting dysbiosis and immune system dysregulation.