Umscheid, Craig A.
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Univ Penn Hlth Syst, Ctr Evidence Based Practice, Philadelphia, PA 19104 USA
Univ Penn, Sch Med, Div Gen Internal Med, Philadelphia, PA 19104 USA
Univ Penn, Sch Med, Ctr Clin Epidemiol & Biostat, Philadelphia, PA 19104 USA Univ Penn Hlth Syst, Ctr Evidence Based Practice, Philadelphia, PA 19104 USA