title: Gallup defines new opinion groups for market analysts.
authors: D E
authors: DE
authors: Johnson
mesh_terms: D001294:Attitude to Health; D002965:Classification; D003710:Demography; D006761:Hospitals; D007407:Interviews as Topic; D008389:Marketing of Health Services / Q000379:methods; D011639:Public Opinion; D013223:Statistics as Topic; D014481:United States