1. Children's Hospital of Philadelphia, Philadelphia, PA, USA
2. Department of Psychiatry, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
3. Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
4. OCD and Anxiety Institute, Bryn Mawr, PA, USA
5. Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA