Acknowledgments
The authors thank Philipp Mulle for help with conducting the study, Beatrice Vetter for performing the plasma LSD and ketanserin concentration determinations, and Michael Arends for proofreading the manuscript.This work was supported by the University Hospital Basel and Mind Medicine, Inc. Knowhow and data associated with this work and owned by University Hospital Basel were licensed by Mind Medicine, Inc. Mind Medicine, Inc., had no role in planning or conducting the present study or the present publication.