Vendrell-Serres J, Soto-Angona Ã, Rodríguez-Urrutia A, Inzoli B, González AL, Ramos-Quiroga JA.  Treating Treatment-resistant Depression with Esketamine Nasal Spray When All Therapeutic Options Have Been Exhausted: Clinical Experience from a Spanish Cohort of Expanded Use.  Clin Psychopharmacol Neurosci 2024;22:159-168.  https://doi.org/10.9758/cpn.23.1097