There have been recent practice and policy concerns over the “quality chasm,” or gap between the promise of evidence-based medicine and the realities of community practice1 with little variation by geographic and sociodemographic factors.2 Studies document disparities in access of care for particular conditions, and there is widespread concern about disparities in health status and health risk factors disadvantaging underserved ethnic minority and lower-socioeconomic status groups.3,4 Addressing quality gaps and health disparities will require implementation of programs to address social determinants of health and improve services delivery across diverse communities. Doing so for underserved communities may be especially challenging owing to resource constraints, underdevelopment of research, and historical distrust in research and health care in some groups.3,5
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