%0 Journal Article %J The New England Journal of Medicine %D 2011 %T The ACO Rules — Striking the Balance between Participation and Transformative Potential %A Meredith B. Rosenthal %A David M Cutler %A Judith Feder %B The New England Journal of Medicine %V 365 %P 1-3 %G eng %U http://www.nejm.org.ezp-prod1.hul.harvard.edu/doi/full/10.1056/NEJMp1106012 %N 4