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MDMA, cannabis, and cocaine produce acute dissociative symptoms.
van Heugten-Van der Kloet D, Giesbrecht T, van Wel J, Bosker WM, Kuypers KP, Theunissen EL, Spronk DB, Jan Verkes R, Merckelbach H, Ramaekers JG. van Heugten-Van der Kloet D, et al. Among authors: jan verkes r. Psychiatry Res. 2015 Aug 30;228(3):907-12. doi: 10.1016/j.psychres.2015.04.028. Epub 2015 Apr 30. Psychiatry Res. 2015. PMID: 26003508 Clinical Trial.
Amygdala volume marks the acute state in the early course of depression.
van Eijndhoven P, van Wingen G, van Oijen K, Rijpkema M, Goraj B, Jan Verkes R, Oude Voshaar R, Fernández G, Buitelaar J, Tendolkar I. van Eijndhoven P, et al. Among authors: jan verkes r. Biol Psychiatry. 2009 May 1;65(9):812-8. doi: 10.1016/j.biopsych.2008.10.027. Epub 2008 Nov 22. Biol Psychiatry. 2009. PMID: 19028381