<style face="normal" font="default" size="100%">Transient physical and psychosocial activities increase the risk of non-persistent and persistent low back pain: a case-crossover study with 12 months follow-up</style>

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0<style face="normal" font="default" size="100%">Transient physical and psychosocial activities increase the risk of non-persistent and persistent low back pain: a case-crossover study with 12 months follow-up</style><style face="normal" font="default" size="100%">Transient physical and psychosocial activities increase the risk of non-persistent and persistent low back pain: a case-crossover study with 12 months follow-up</style>