Methods According to the questionnaire, the test of PPD (purified protein derivative), X-ray checking and sputum bacteria culture method had been used.
方法应用PPD试验、X线透视、痰菌培养等方法开展现况调查。
Methods According to the questionnaire, the test of PPD (purified protein derivative), X-ray checking and sputum bacteria culture method had been used.
方法应用PPD试验、X线透视、痰菌培养等方法开展现况调查。
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