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Pang MY, Mak MK.Pang MY, et al. Among authors: mak mk.Arch Phys Med Rehabil. 2012 Dec;93(12):2352-9. doi: 10.1016/j.apmr.2012.06.004. Epub 2012 Jun 15.Arch Phys Med Rehabil. 2012.PMID: 22705465