From the press release:
"Retail medical clinics located in pharmacies and other stores typically attract insured and uninsured patients who are seeking help for a small group of easy-to-treat illnesses or preventive care and do not otherwise have a regular health care provider..."The RAND press release can be found http://www.rand.org/news/press/2008/09/10/
The Health Affairs article abstract is at http://content.healthaffairs.org/cgi/content/abstract/27/5/1272