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机译:Racial Disparities In Geographic Access To Primary Care In Philadelphia
Christiana Care Hlth Syst, Value Inst, Newark, DE 19702 USA;
Univ Penn, Leonard Davis Inst Hlth Econ, Philadelphia, PA 19104 USA;
French Natl Inst Agr Res, Dept Environm & Agron, Paris, FranceBoston Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02215 USA;