Treatment-resistant depression and intranasal esketamine: Spanish consensus on theoretical aspects - Mora, Fernando; Ramos-Quiroga, Jose Antoni; Baca-Garcia, Enrique; Crespo, Jose Manuel; Gutierrez-Rojas, Luis; Madrazo, Aranzazu; Perez Costillas, Lucia; Saiz, Pilar A; Tordera, Vicente; Vieta, Eduard (FRONTIERS IN PSYCHIATRY, 2025)