<style face="normal" font="default" size="100%">A randomized controlled trial of tai chi for long-term low back pain (TAI CHI): study rationale, design, and methods</style>

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0<style face="normal" font="default" size="100%">A randomized controlled trial of tai chi for long-term low back pain (TAI CHI): study rationale, design, and methods</style><style face="normal" font="default" size="100%">A randomized controlled trial of tai chi for long-term low back pain (TAI CHI): study rationale, design, and methods</style>