P.188 Long-term effects of psilocybin on cerebral serotonin 2A receptor levels and personality - Mie Madsen; P.M. Fisher; D.S. Stenbæk; S. Kristiansen; D. Burmester; S. Lehel; Tomáš Páleníček; Claus Svarer; B. Ozenne; Gitte M. Knudsen (European Neuropsychopharmacology, 2019)