Hard choices in public health.
D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control; D003363:Cost Control; D006801:Humans; D007878:Legislation as Topic; D009316:National Institutes of Health (U.S.) / Q000191:economics; D009937:Organizational Objectives / Q000191:economics; D011634:Public Health / Q000191:economics / Q000639:trends*; D014481:United States