Obsessive-compulsive and related symptoms in children and adolescents with rheumatic fever with and without chorea: a prospective 6-month study - Asbahr, Fernando R; Negrão, André B; Gentil Filho, Valentim; Zanetta, Dirce Maria Trevisan; Paz, José A. da; Dias, Maria J. Marques; Kiss, Maria H. (The American Journal of Psychiatry, 1998)