Leuzinger-Bohleber, M., Kaufhold, J., Kallenbach, L., Negele, A., Ernst, M., Keller, W., Fiedler, G., Hautzinger, M., Bahrke, U. & Beutel, M. (2019) How to measure sustained psychic transformations in long-term treatments of chronically depressed patients: Symptomatic and structural changes in the LAC Depression Study of the outcome of cognitive-behavioural and psychoanalytic long-term treatments. International Journal of Psychoanalysis 100:99-127