<style face="normal" font="default" size="100%">Could the weather trigger an episode of acute low back pain? A case cross-over study [proceedings]</style>

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3<style face="normal" font="default" size="100%">Could the weather trigger an episode of acute low back pain? A case cross-over study [proceedings]</style><style face="normal" font="default" size="100%">Could the weather trigger an episode of acute low back pain? A case cross-over study [proceedings]</style>