Regional Cerebral Blood Flow Abnormalities in Early-Onset Obsessive Compulsive Disorder : An Exploratory SPECT Study - Busatto Filho, Geraldo; Buchpiguel, Carlos A.; Zamignani, Denis R.; Garrido, Griselda E. J.; Glabus, Michael F.; Rosario-Campos, Maria C.; Castro, Cláudio C.; Maia, Alex; Rocha, Euclides T.; McGuire, Philip K.; Miguel Filho, Euripedes Constantino (Journal of American Academy of Child & Adolescent Psychiatry, 2001)