Schmidt Harald, Voigt Kristin, Emanuel Ezekiel J
Department of Medical Ethics and Health Policy and the Center for Health Incentives and Behavioral Economics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA.
N Engl J Med. 2013 Apr 11;368(15):1369-71. doi: 10.1056/NEJMp1301951. Epub 2013 Mar 27.