Joynt Karen E, Jha Ashish K
Department of Health Policy and Management, Harvard School of Public Health, and Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, USA.
N Engl J Med. 2012 Apr 12;366(15):1366-9. doi: 10.1056/NEJMp1201598. Epub 2012 Mar 28.