These discrepancies were probably not significant problems since similar discrepancies were also seen in other studies [ 27 , 30 ].
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The Malay version of SF-36 health survey instrument: testing data quality, scaling assumptions, reliability and validity in post-coronary artery bypass grafting (CABG) surgery patients at the National Heart Institute (Institut Jantung Negara-IJN), Kuala Lumpur.
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