📄 [Cluster investigation Technical Guidelines for the 2019 Novel Coronavirus Pneumonia (COVID-19), China (1st Trial Version)].

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year ⏰ 2020

journal 📚 Zhonghua Liu Xing Bing Xue Za Zhi

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doi 📄 10.3760/cma.j.issn.0254-6450.2020.03.001 ⤴

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