atai Life Sciences (NASDAQ: ATAI), a clinical-stage biopharmaceutical company focused on mental health, announced that, while PCN-101 (R-ketamine) demonstrated signals of efficacy across all timepoints out to two weeks, Perception Neuroscience’s Phase 2a clinical trial did not meet its primary endpoint of a statistically significant change from baseline in participants’ MADRS (Montgomery-Åsberg Depression Rating Scale)…