Rubio Doris McGartland, Sufian Meryl, Trochim William M
Center for Research on Health Care Data Center, Division of General Internal Medicine, Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Clin Transl Sci. 2012 Apr;5(2):138-9. doi: 10.1111/j.1752-8062.2011.00381.x. Epub 2012 Feb 23.