Molfese, PhD vii CONTENTS Dedication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi 1 Historical Aspects of Attention Deficit Hyperactivity Disorder . Dykman 2 Scanning the Genome for Attention Deficit Hyperactivity Disorder .