Nallamothu Brahmajee K, Krumholz Harlan M
The Veterans Affairs Ann Arbor Health Services Research and Development Center of Excellence, Division of Cardiovascular Medicine and Center for Healthcare Outcomes and Policy, University of Michigan Medical School, Ann Arbor, Michigan, USA.
JAMA. 2010 Nov 10;304(18):2059-60. doi: 10.1001/jama.2010.1509.