<style face="normal" font="default" size="100%">Swiss ball exercise versus floor exercise for patients with chronic low back pain: Effects on trunk muscle endurance and control of lumbo-pelvic posture-</style>

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3<style face="normal" font="default" size="100%">Swiss ball exercise versus floor exercise for patients with chronic low back pain: Effects on trunk muscle endurance and control of lumbo-pelvic posture-</style><style face="normal" font="default" size="100%">Swiss ball exercise versus floor exercise for patients with chronic low back pain: Effects on trunk muscle endurance and control of lumbo-pelvic posture-</style>