title: Largest patient-satisfaction measurement firms. Ranked by total number of clients in 2012.
mesh_terms: D003132:Commerce / Q000145:classification* / Q000706:statistics & numerical data; D003253:Consultants / Q000706:statistics & numerical data; D006302:Health Services Research; D006801:Humans; D017060:Patient Satisfaction / Q000706:statistics & numerical data*; D014481:United States