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M. Trotzek, S. Koitka, and C. M. Friedrich, “Early detection of depression based on linguistic metadata augmented classifiers revisited,” in Experimental IR meets multilinguality, multimodality, and interaction : 9th International Conference of the CLEF Association, CLEF 2018, Avignon, France, September 10-14, 2018, proceedings, Cham: Springer International Publishing, 2018, pp. 191–202.