Determination of smoking status among those with complete tuberculin skin test (TST) results.
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∧Ages 3-11 did not receive smoking behavior questions
3~11岁年龄段的研究对象未被问及吸烟行为相关问题
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2015-12-02

∧Ages 3-11 did not receive smoking behavior questions
3~11岁年龄段的研究对象未被问及吸烟行为相关问题