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| Diagnostic Value of the Combination of EBUS-TBNA with Serum CEA, NSE, and CYFRA21-1 in Lung Cancer |
| LIU Qiang, ZHANG Zhi, SHENG Cuixia, LI Jie, YU Huancheng |
| First-author's address: Department of Respiratory Medicine, Fuzhou First People's Hospital, Fuzhou 344000, China |
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