Increased concentration of plasma homocysteine in children with systemic lupus erythematosus - Prado, Rogério do; D'Almeida, Vânia; Guerra-Shinohara, Elvira Maria; Galdieri, Luciano de Camargo; Terreri, Maria Teresa; Hilário, Maria Odete Esteves (Clinical and Experimental Rheumatology, 2006)