Concurrent validity of the pressure biofeedback unit and surface electromyography in measuring transversus abdominis muscle activity in patients with chronic nonspecific low back pain.
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Lima PO, Oliveira RR, Moura Filho AG, Raposo MC, Costa LO, Laurentino GE.
Rev Bras Fisioter. 2012 Jul 24. pii: S1413-35552012005000038.
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PMID: 22832703