My lede:

Under criticism from physician organizations and others for further fracturing an already disjointed health system, store-based health clinics and their supporters have argued that these nurse-practitioner-staffed offices offer uninsured patients affordable, walk-in care at convenient locations.

But most retail clinics — 86.4% — are located in well-to-do areas that are not classified as medically underserved, according to a May 25 Archives of Internal Medicine study (archinte.ama-assn.org/cgi/content/abstract/169/10/945/).

The whole shebang.