Wittchen, H.-U., Höfler, M., Gander, F., Pfister, H., Storz, S., Üstün, B., Müller, N., & Kessler, R. C. (1999). Screening for mental disorders: performance of the Composite International Diagnostic-Screener (CID-S). International Journal of Methods in Psychiatric Research, 8, 59-70.