1. Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, USA
2. Department of Psychology and Neuroscience (CB 3270), University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
3. Keck School of Medicine, Department of Psychiatry and Behavioral Sciences, University of Southern California, Los Angeles, CA, USA
4. Houston OCD Program, Houston, TX, USA
5. Department of Psychology, University of New South Wales, Sydney, Australia