Antidepressive Agents, Tricyclic/therapeutic use; Antidepressive Agents/therapeutic use; Depression/drug therapy; Depressive Disorder, Treatment-Resistant/drug therapy; Monoamine Oxidase Inhibitors/therapeutic use; Selective Serotonin Reuptake Inhibitors/therapeutic use; Serotonin and Noradrenaline Reuptake Inhibitors/therapeutic use; Antidepressive Agents/administration & dosage; Antidepressive Agents/adverse effects; Antidepressive Agents, Tricyclic/administration & dosage; Antidepressive Agents, Tricyclic/adverse effects; Cognitive Behavioral Therapy; Depression/diagnosis; Depression/psychology; Depressive Disorder, Treatment-Resistant/diagnosis; Depressive Disorder, Treatment-Resistant/psychology; Drug Administration Schedule; Electric Stimulation Therapy; Electroconvulsive Therapy; Humans; Monoamine Oxidase Inhibitors/administration & dosage; Monoamine Oxidase Inhibitors/adverse effects; Recurrence; Remission Induction; Selective Serotonin Reuptake Inhibitors/administration & dosage; Selective Serotonin Reuptake Inhibitors/adverse effects; Serotonin and Noradrenaline Reuptake Inhibitors/administration & dosage; Serotonin and Noradrenaline Reuptake Inhibitors/adverse effects; Transcranial Magnetic Stimulation; Treatment Outcome