Results From a Long-Term Observational Follow-Up Study of a Single Dose of Psilocybin for a Treatment-Resistant Episode of Major Depressive Disorder - Guy M. Goodwin; Ania Nowakowska; Merve Atli; Boadie W. Dunlop; David Feifel; David J. Hellerstein; Lindsey Marwood; Zainib Shabir; Sunil Mistry; S. C. Stansfield; Emma Teoh; Joyce Tsai; et al. (The Journal of Clinical Psychiatry, 2025)