Eliminating waste and fraud in Medicare [electronic resource] : an examination of prior authorization requirements for power mobility devices : hearing before the Special Committee on Aging, United States Senate, One Hundred Twelfth Congress, second session, Washington, DC, September 19, 2012.
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Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O. 2013.
