<style face="normal" font="default" size="100%">Does pain-catastrophising mediate the effect of tai chi on treatment outcomes for people with low back pain?</style>

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0<style face="normal" font="default" size="100%">Does pain-catastrophising mediate the effect of tai chi on treatment outcomes for people with low back pain?</style><style face="normal" font="default" size="100%">Does pain-catastrophising mediate the effect of tai chi on treatment outcomes for people with low back pain?</style>