PART 1: INTRODUCTION: Conceptual antecedents of the anxiety disorders / R. D. Marshall and D. F. Klein -- PART 2: SYMPTOMS AND SYDROMES: Relationships among anxiety disorders: patterns and implications / H. U. Wittchen, Y. Lecrubier, K. Beesdo, and A. Nocon -- Panic disorder: symptoms and syndromes / S. S. Sinha and J. Gorman -- Generalized anxiety disorder / J. Monnier and O. Brawman-Mintzer -- Post-traumatic stress disorder / S. A. M. Rauch and E. B. Foa -- Obsessive-compulsive disorder / J. Zohar, Y. Sasson, M. Chopra, R. Amiaz and N. Nakash -- Social anxiety disorder/ P. L. du Troit and D. J. Stein -- Sleep aspects of anxiety disorders / T. A. Mellman -- Childhood antecedents of adult anxiety disorders / S. J. Fredman, D. R. Hirschfeld-Becker, J. W. Smoller and J. F. Rosenbaum -- Anxiety and schizophrenia / R. A. Emsley and D. J. Stein -- PART 3: MECHANISMS: Neurochemical aspects of anxiety / S. V. Argyropoulos and D. J. Nutt -- Brain imaging and anxiety disorders / A. L. Malizia -- Genetic dissection of anxiety and related disorders / K. P. Lesch -- Respiration and anxiety / E. Griez and G. Perna -- Pharmacological challenge agents in anxiety / J. Swain. D. Koszycki, J. Shlik, and J. Bradwejn -- Panic disorder and medical illness / T. S. Zaubler and W. Katon -- PART 4: TREATMENTS: Benzodiazepines / C. Faravelli, S. Rosi, and E. Truglia -- Selective serotonin reuptake inhibitors in the treatment of the anxiety disorders / J. C. Ballenger -- Treatment of anxiety disorders with tricyclic antidepressants / R. Rosenberg -- Buspirone in the treatment of anxiety disorders / K. Rickels, S. Khalid-Khan and M. Rynn -- Antihistamines in the treatment of psychic and somatic anxiety states / M. M. M. P. Van Moffaert -- Anxiety disorders: new antidepressants / R. B. Hidalgo and J. R. T. Davidson -- Cognitive behavioral treatment of anxiety disorders / S. A. Falsetti, A. Combs-Lane and J. L. Davis -- Exposure therapy in the treatment of anxiety disorders / S. P. Cahill and E. B. Foa -- Anxiety disorders: alternative drug treatments / N. Laufer, S. Gur, R. Gross-Isseroff and A. Weizman -- Physical treatments / T. E. Schlaepfer and B. D. Greenberg -- Herbal therapy and anxiety / M. Bourin -- PART 5: CONCLUSION: Anxiety disorders: current needs and future prospects / D. Nutt and J. Ballenger