Tic-related obsessive–compulsive disorder

From the Department of Clinical Neuroscience, Psychiatry, Pediatrics and Community Health Sciences, University of Calgary, Calgary, Alta., Canada (Pringsheim); and the Department of Psychiatry and Biobehavioral Sciences, University of California Los Angeles Semel Institute, Los Angeles, Calif., USA (Piacentini)

From the Department of Clinical Neuroscience, Psychiatry, Pediatrics and Community Health Sciences, University of Calgary, Calgary, Alta., Canada (Pringsheim); and the Department of Psychiatry and Biobehavioral Sciences, University of California Los Angeles Semel Institute, Los Angeles, Calif., USA (Piacentini)