RT Journal Article SR Electronic T1 Sustainable Growth Rate Repealed, MACRA Revealed: Historical Context and Analysis of Recent Changes in Medicare Physician Payment Methodologies JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A4522 A1 J.A. Hirsch A1 H.B. Harvey A1 R.M. Barr A1 W.D. Donovan A1 R. Duszak, Jr A1 G.N. Nicola A1 P.W. Schaefer A1 L. Manchikanti YR 2015 UL http://www.ajnr.org/content/early/2015/11/19/ajnr.A4522.abstract AB