van Belkum, S. ., Geugies, H. ., Lysen, T. ., Cleare, A. ., Peeters, F. ., Penninx, B. ., … Ruhe, E. . (2018). Validity of the Maudsley Staging Method in Predicting Treatment-Resistant Depression Outcome Using the Netherlands Study of Depression and Anxiety. The Journal of Clinical Psychiatry, 79(1). https://doi.org/10.4088/JCP.17m11475 (Original work published 2018)

Breeksema, J. ., Niemeijer, A. ., Krediet, E. ., Vermetten, E. ., & Schoevers, R. . (2020). Psychedelic Treatments for Psychiatric Disorders: A Systematic Review and Thematic Synthesis of Patient Experiences in Qualitative Studies. CNS Drugs, 34(9), 925-946. https://doi.org/10.1007/s40263-020-00748-y