The Nosology and Pathophysiology of Irritability
Ellen Leibenluft, M.D. National Institute of Mental Health, Bethesda, MD

Irritability: Developmental Trajectories and Causal Pathways
Argyris Stringaris, M.D., M.R.C.Psych. Kings College London Institute of Psychiatry, London United Kingdom

Assessing Irritability: Are Our Instruments Good Enough
Margarita Garcia-Amador, M.D. Unidad de Psiquiatria de Adolescentes, Hospital Universitario Gregorio Maranon, Madrid Spain

Irritability, Bipolar Disorder, and Diagnostic Decision Making
Cathryn A. Galanter, M.D. Columbia University, New York, NY