Kessler, R. C., Wittchen, H.-U., Abelson, J. M., Kendler, K. S., Knäuper, B., & Zhao, S. (1998). Methodological studies of the Composite International Diagnostic Interview (CIDI) in the US National Comorbidity Survey (NCS). International Journal of Methods in Psychiatric Research, 7, 33-55.