When living becomes difficult.
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Daniel
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D000368:Aged / Q000523:psychology*; D000375:Aging; D001293:Attitude to Death; D005065:Euthanasia / Q000523:psychology / Q000639:trends; D005544:Forecasting; D006301:Health Services Needs and Demand; D006801:Humans; D008136:Longevity; D011788:Quality of Life / Q000523:psychology*; D013727:Terminal Care / Q000523:psychology / Q000639:trends