Largest patient-satisfaction measurement firms. Ranked by total number of engagements in 2008.
D003132:Commerce / Q000145:classification*; D003253:Consultants / Q000706:statistics & numerical data; D004181:Directories as Topic; D019538:Health Care Surveys; D006801:Humans; D020407:Internet; D010067:Ownership; D017060:Patient Satisfaction; D014481:United States