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Introduction: Electroconvulsive therapy (ECT) is a safe and effective treatment for treatment resistant severe mental disorders. However, it has a high relapse rate, following the acute course (A‑ECT). Maintenance treatment is recommended to increase remission rate and duration. Maintenance ECT (M‑ECT) is an option, although under‑prescribed. The aim of this study was to assess M‑ECT effectiveness in reducing n...