Themed issue: Accountable care organizations and vertical integration

Professor of the Graduate School, Blue Cross of California Distinguished Professor of Health Policy and Management Emeritus, Dean Emeritus, Co-Director of Center for Healthcare Organizational and Innovation Research, and Co-Director of Center for Lean Engagement and Research in Healthcare, School of Public Health, University of California, Berkeley. The author has disclosed that he has no significant relationships with, or financial interest in, any commercial companies pertaining to this article.