Retraction Note to: Gene expression analysis indicates CB1 receptor upregulation in the hippocampus and neurotoxic effects in the frontal cortex 3 weeks after single-dose MDMA administration in Dark Agouti rats. (December 2016) - Petschner, Peter; Tamasi, Viola; Adori, Csaba; Kirilly, Eszter; Ando, Romeo; Tothfalusi, Laszlo; Bagdy, Gyorgy