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Depressive disorder (depression) - World Health ...
Depression (major depressive disorder) - Symptoms and causes
英語「depression」の意味・使い方・読み方 | Weblio英和辞書
抑うつ - Wikipedia
depressionの意味 - goo辞書 英和和英
Depression - National Institute of Mental Health (NIMH)
Psychiatry.org - What Is Depression?
Depression - World Health Organization (WHO)
Depression (major depressive disorder) - Diagnosis and ...
Major Depression | Johns Hopkins Medicine