52例X线胸片阴性顽固性咳嗽患者的纤维支气管镜检查结果分析
52례X선흉편음성완고성해수환자적섬유지기관경검사결과분석
Analysis of the examination of Fiberaptic Bronchoscopy for 52 cases of refractory cough with nonsuspicious chest roentgenograms
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