A Phase 1, Dose-Ranging Study to Assess Safety and Psychoactive Effects of a Vaporized 5-Methoxy-N, N-Dimethyltryptamine Formulation (GH001) in Healthy Volunteers. - Reckweg J; Mason NL; van Leeuwen C; Toennes SW; Terwey TH; Ramaekers JG (Frontiers in pharmacology, 2021)