TY - JOUR AU - Ray, G T; Levine, P; Croen, L A TI - Attention-Deficit/Hyperactivity Disorder in Children- Excess Costs Before and After Initial Diagnosis and Treatment Cost Differences by Ethnicity JO - Archives of Pediatrics & Adolescent Medicine VL - 160 PY - 2006 DO - 10.1001/archpedi.160.10.1063 SP - 1063 EP - 1069 N1 - et al. ER -