Chunk #0 — Introduction

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Immune-Related Comorbidities in Childhood-Onset Obsessive Compulsive Disorder: Lifetime Prevalence in the Obsessive Compulsive Disorder Collaborative Genetics Association Study.

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Obsessive compulsive disorder (OCD) affects 1%–3% of children worldwide and causes significant distress for patients and families (Hollander et al. 2016). Despite effective cognitive behavioral therapy and pharmacotherapy, many patients experience a chronic, episodic course with long-term functional impairment (Stewart et al. 2004; Mancebo et al. 2014).