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Davis AM, Devlin M, Griffin AM, Wunder JS, Bell RS.Davis AM, et al. Among authors: wunder js.Arch Phys Med Rehabil. 1999 Jun;80(6):615-8. doi: 10.1016/s0003-9993(99)90161-2.Arch Phys Med Rehabil. 1999.PMID: 10378484Clinical Trial.