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Periodontal Disease and Risk of Chronic Obstructive Pulmonary Disease: A Meta-Analysis of Observational Studies
- Xian-Tao Zeng,
- Ming-Li Tu,
- Dong-Yan Liu,
- Dong Zheng,
- Jing Zhang,
- WeiDong Leng
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- Published: October 19, 2012
- https://doi.org/10.1371/journal.pone.0046508
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