1. Alonso, J., Petukhova, M., Vilagut, G., Chatterji, S., Heeringa, S., Üstün, T. B., et al. (2010). Days out of role due to common physical and mental conditions: Results from the WHO World Mental Health surveys. Molecular Psychiatry. doi: 10.1038/mp. 2010.101. Advance online publication.
2. American Psychiatric Association. (1987). Diagnostic and statistical manual of mental disorders (3rd ed., text rev.). Washington, DC: Author.
3. American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders (4th ed., text rev.). Washington, DC: Author.
4. Angold, A., Costello, E. J., & Erkanli, A. (1999). Comorbidity. Journal of Child Psychology and Psychiatry, 40, 57–87.
5. Beesdo, K., Bittner, A., Pine, D. S., Stein, M. B., Höfler, M., Lieb, R., & Wittchen, H.-U. (2007). Incidence of social anxiety disorder and the consistent risk for secondary depression in the first three decades of life. Archives of General Psychiatry, 64, 903–912.