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Depression (major depressive disorder) - Symptoms and causes
Depression (major depressive disorder) - Mayo Clinic
Depression - National Institute of Mental Health (NIMH)
Depressive disorder (depression) - World Health Organization …
Psychiatry.org - What Is Depression?
Depression: What It Is, Symptoms, Causes, Treatment, and More - Healthline
Depression: Causes, Symptoms, Types & Treatment - Cleveland Clinic
Clinical Depression (Major Depressive Disorder) - Cleveland Clinic
Depression - National Institute of Mental Health (NIMH)
Major Depression | Johns Hopkins Medicine