<style face="normal" font="default" size="100%">Quality of life: elderly people who do and do not participate in Tai-Chi</style>

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31<style face="normal" font="default" size="100%">Quality of life: elderly people who do and do not participate in Tai-Chi</style><style face="normal" font="default" size="100%">Quality of life: elderly people who do and do not participate in Tai-Chi</style>