Are There Still Endogenous And Reactive Depressions? Clinical Notes From A Refractory Cotard Syndrome With A De Novo Post-Ect Dissociative Episode [¿Siguen Existiendo Depresiones Endógenas Y Reactivas? Notas Clínicas a Partir de Un Caso de Síndrome de Cotard Con Episodio Disociativo de Novo Post-Ect]