[Does advancing age not spoil mood?]
- PMID: 1440760
[Does advancing age not spoil mood?]
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[The Zung-12: a questionnaire for depression in the elderly].Tijdschr Gerontol Geriatr. 1992 Jun;23(3):85-93. Tijdschr Gerontol Geriatr. 1992. PMID: 1609449 Dutch.
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