title: The difference between efficacy and effectiveness research in studying attention-deficit/hyperactivity disorder.
authors.forename: M L
authors.initials: ML
authors.lastname: Wolraich
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis / Q000188:drug therapy*; D000697:Central Nervous System Stimulants / Q000627:therapeutic use*; D002648:Child; D006801:Humans; D008774:Methylphenidate / Q000627:therapeutic use*; D010818:Practice Patterns, Physicians'
chemical_list: D000697:Central Nervous System Stimulants; D008774:Methylphenidate