<style face="normal" font="default" size="100%">Feasibility of using short message service to collect pain outcomes in a low back pain clinical trial</style>

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0<style face="normal" font="default" size="100%">Feasibility of using short message service to collect pain outcomes in a low back pain clinical trial</style><style face="normal" font="default" size="100%">Feasibility of using short message service to collect pain outcomes in a low back pain clinical trial</style>