title: Some approaches and problems in the study of the use of services--an overview.
mesh_terms: D001294:Attitude to Health; D001519:Behavior; D003657:Decision Making; D003695:Delivery of Health Care; D003710:Demography; D004467:Economics; D005060:Europe; D005190:Family; D005843:Geography; D006801:Humans; D010548:Personal Health Services / Q000706:statistics & numerical data*; D011446:Prospective Studies; D011593:Psychology, Social; D011787:Quality of Health Care; D011996:Records; D012106:Research; D012189:Retrospective Studies; D012494:Sampling Studies; D012946:Social Welfare; D012947:Social Work; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D014481:United States