Garber Alan M, Phelps Charles E
Center for Primary Care and Outcomes Research, Center for Health Policy, VA Palo Alto Health Care System and Stanford University, Stanford, CA 94305, United States.
J Health Econ. 2008 Jul;27(4):819-21. doi: 10.1016/j.jhealeco.2008.05.002. Epub 2008 May 3.