Obsessive-compulsive disorder: Influence of age at onset on comorbidity patterns - Mathis, Maria Alice de; Rosario, Maria Conceição do; Diniz, Juliana Belo; Torres, Albina Rodrigues; Shavitt, Roseli Gedanke; Ferrão, Ygor Arzeno; Fossaluza, Victor; Pereira, Carlos Alberto de Bragança; Miguel, Eurípedes Constantino (European Psychiatry, 2008)