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This systematic review and meta-analysis assesses the frequency and severity of adverse events (AEs), including serious and nonserious AEs, among studies of classic psychedelics in 4 research databases.

This cohort study examines data for the population of Denmark across 20 years to estimate suicide risk across a range of medical conditions, gauge any dose-response–like relationship between disability burden and suicide risk, and determine any role prior mental disorder might have.

This Special Communication discusses the merits and feasibility of imaging biomarkers in psychiatry, balancing scientific and practical considerations.