Acknowledgments; Contributors; Section 1. Introduction: 1. Introduction Kate M. Scott, Peter de Jonge, Dan J. Stein, Ronald C. Kessler; 2. The Cross-National Epidemiology of Mental Disorders Dan J. Stein, Peter de Jonge, Ronald C. Kessler, Kate M. Scott; 3. Methods of the World Mental Health Surveys Ronald C. Kessler, Steven G. Heeringa, Beth-Ellen Pennell, Nancy A. Sampson, Alan M. Zaslavsky; Section 2. The Disorders: 4. Major Depressive Disorder Evelyn J. Bromet, Laura Helena Andrade, Ronny Bruffaerts, David R Williams; 5. Bipolar Spectrum Disorder Ronald C. Kessler, Elie G. Karam, Sing Lee, Brendan Bunting, Andrew Nierenberg; 6. Generalized Anxiety Disorder Ayelet Meron Ruscio, Lauren S. Hallion, Koen Demyttenaere, Sing Lee, Carmen C. W. Lim; 7. Panic Disorder and Panic Attacks Peter de Jonge, Annelieke Roest, Carmen C.W. Lim, Daphna Levinson, Kate M. Scott; 8. Agoraphobia Annelieke Roest, Peter de Jonge, Carmen C.W. Lim, Dan J Stein, Maria Elena Medina-Mora, Kate M. Scott; 9. Social Anxiety Disorder Dan J. Stein, Norito Kawakami, Giovanni de Girolamo, Jean-Pierre Lepine; 10. Specific Phobia Klaas Wardenaar, Corina Benjet, Maria Carmen Viana, Peter de Jonge; 11. Posttraumatic Stress Disorder Andrew Ratanatharathorn, Lauren C. Ng, Fernando Navarro-Mateu, Karestan C. Koenen, 12. Separation Anxiety Disorder Derrick Silove, Yanling He, Marina Piazza, Kate M. Scott; 13. Intermittent Explosive Disorder Kate M. Scott, Carmen C.W. Lim, Ali Al-Hamzawi, Jordi Alonso; 14. Attention Deficit Hyperactivity Disorder John Fayyad, Josep Maria Haro, Sergio Aguilar-Gaxiola, Ronald C. Kessler; 15. Conduct Disorder and Oppositional Defiant Disorder Brianna J. Turner, Chiyi Hu, Jose Posada Villa, Matthew K. Nock; 16. Alcohol Use Disorders Meyer Glantz, Jacek Moskalewicz, Jose Miguel Caldas-de-Almeida, Louisa Degenhardt; 17. Drug Use Disorders Louisa Degenhardt, Yolanda Torres, Hristo Hinkov, Margreet ten Have; 18. Bulimia Nervosa and Binge Eating Disorder Ronald C. Kessler, James I. Hudson, Victoria Shahly, Andrzej Kiejna; 19. Psychotic Experiences John J. McGrath, Sukanta Saha, Carmen C.W. Lim, Oye Gureje, Silvia Florescu; Section 3. Overview: 20. Comorbidity Klaas Wardenaar, Yueqin Huang, Bogdan Wojtyniak, Peter de Jonge; 21. Service Use Sara Evans-Lacko, Hisateru Tachimori, Viviane Kovess-Masfety, Somnath Chatterji, Graham Thornicroft; 22. Discussion Kate M. Scott, Dan J. Stein, Peter de Jonge, Ronald C. Kessler.