Acknowledgments; Contributors; Part I. Introduction: 1. Introduction Kate M. Scott, Peter de Jonge, Dan J. Stein and Ronald C. Kessler; 2. The cross-national epidemiology of mental disorders Dan J. Stein, Peter de Jonge, Ronald C. Kessler and Kate M. Scott; 3. Methods of the world mental health surveys Ronald C. Kessler, Steven G. Heeringa, Beth-Ellen Pennell, Nancy A. Sampson and Alan M. Zaslavsky; Part II. The Disorders: 4. Major depressive disorder Evelyn J. Bromet, Laura Helena Andrade, Ronny Bruffaerts and David R Williams; 5. Bipolar spectrum disorder Ronald C. Kessler, Elie G. Karam, Sing Lee, Brendan Bunting and Andrew Nierenberg; 6. Generalized anxiety disorder Ayelet Meron Ruscio, Lauren S. Hallion, Koen Demyttenaere, Sing Lee and Carmen C. W. Lim; 7. Panic disorder and panic attacks Peter de Jonge, Annelieke Roest, Carmen C.W. Lim, Daphna Levinson and Kate M. Scott; 8. Agoraphobia Annelieke Roest, Peter de Jonge, Carmen C.W. Lim, Dan J Stein, Maria Elena Medina-Mora and Kate M. Scott; 9. Social anxiety disorder Dan J. Stein, Norito Kawakami, Giovanni de Girolamo and Jean-Pierre Lépine; 10. Specific phobia Klaas Wardenaar, Corina Benjet, Maria Carmen Viana and Peter de Jonge; 11. Posttraumatic stress disorder Andrew Ratanatharathorn, Lauren C. Ng, Fernando Navarro-Mateu and Karestan C. Koenen, 12. Separation anxiety disorder Derrick Silove, Yanling He, Marina Piazza and Kate M. Scott; 13. Intermittent explosive disorder Kate M. Scott, Carmen C.W. Lim, Ali Al-Hamzawi and Jordi Alonso; 14. Attention deficit hyperactivity disorder John Fayyad, Josep Maria Haro, Sergio Aguilar-Gaxiola and Ronald C. Kessler; 15. Conduct disorder and oppositional defiant disorder Brianna J. Turner, Chiyi Hu, José Posada Villa and Matthew K. Nock; 16. Alcohol use disorders Meyer Glantz, Jacek Moskalewicz, José Miguel Caldas-de-Almeida and Louisa Degenhardt; 17. Drug use disorders Louisa Degenhardt, Yolanda Torres, Hristo Hinkov and Margreet ten Have; 18. Bulimia nervosa and binge eating disorder Ronald C. Kessler, James I. Hudson, Victoria Shahly and Andrzej Kiejna; 19. Psychotic experiences John J. McGrath, Sukanta Saha, Carmen C.W. Lim, Oye Gureje and Silvia Florescu; Part III. Overview: 20. Comorbidity Klaas Wardenaar, Yueqin Huang, Bogdan Wojtyniak and Peter de Jonge; 21. Service use Sara Evans-Lacko, Hisateru Tachimori, Viviane Kovess-Masféty, Somnath Chatterji and Graham Thornicroft; 22. Discussion Kate M. Scott, Dan J. Stein, Peter de Jonge and Ronald C. Kessler.