<style face="normal" font="default" size="100%">Selecting an appropriate placebo for spinal manipulative therapy in a primary care low back pain trial</style>

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3<style face="normal" font="default" size="100%">Selecting an appropriate placebo for spinal manipulative therapy in a primary care low back pain trial</style><style face="normal" font="default" size="100%">Selecting an appropriate placebo for spinal manipulative therapy in a primary care low back pain trial</style>