NEW YORK (UPI) -- Patrons of so-called retail health clinics in the United States generally were pleased with the service they received, a Harris Poll indicated.

The latest Harris Interactive-Wall Street Journal healthcare study indicated U.S. adults who used such a clinic generally were pleased -- with 90 percent of the respondents saying they were very or somewhat satisfied with the quality of care. Similar results were seen for cost (86%) and quality of care (88%).

The clinics -- usually found in stores such as Walgreens, Target and Wal-Mart and usually staffed by nurse practitioners and physician assistants -- also are popular for services such as vaccinations and care of respiratory infections.