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[Epidemiological data of chronic obstructive pulmonary disease in Yanqing County in Beijing]

Wan-zhen Yao1, Hong Zhu, Ning Shen

  • 1Department of Respiratory Medicine, Peking University Third Hospital, Beijing 100083, China.

Beijing Da Xue Xue Bao. Yi Xue Ban = Journal of Peking University. Health Sciences
|April 21, 2005
PubMed
Abstract

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