Preadmission certification and denied hospital stays: two surveys of PSROs.
D004219:District of Columbia; D005069:Evaluation Studies as Topic; D006801:Humans; D007902:Length of Stay / Q000191:economics; D006278:Medicare; D010343:Patient Admission / Q000191:economics*; D011366:Professional Review Organizations / Q000191:economics*; D011795:Surveys and Questionnaires; D014481:United States