<style face="normal" font="default" size="100%">Psychological wellbeing and all-cause mortality in the oldest old in China: a longitudinal survey-based study</style>

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0<style face="normal" font="default" size="100%">Psychological wellbeing and all-cause mortality in the oldest old in China: a longitudinal survey-based study</style><style face="normal" font="default" size="100%">Psychological wellbeing and all-cause mortality in the oldest old in China: a longitudinal survey-based study</style>