Umscheid, Craig A.
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Hosp Univ Penn, Dept Med, Div Gen Internal Med, Philadelphia, PA 19104 USA
Univ Penn, Perelman Sch Med, Ctr Clin Epidemiol & Biostat, Philadelphia, PA 19104 USA
Univ Penn, Leonard Davis Inst Hlth Econ, Philadelphia, PA 19104 USA
Univ Penn, Ctr Evidence Based Practice, Philadelphia, PA 19104 USA Univ Penn, Dept Med, Philadelphia, PA 19104 USA