The emergence of qualitative methods in health services research.
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D003625:Data Collection / Q000379:methods; D019317:Evidence-Based Medicine; D006302:Health Services Research / Q000191:economics / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D011785:Quality Assurance, Health Care / Q000379:methods; D012107:Research Design; D012109:Research Support as Topic; D013223:Statistics as Topic / Q000193:education