Establishment and study of risk model for predicting prognosis of COPD patients in acute exacerbation stage by combining clinical characteristics，MMP⁃12，FIB and CC⁃16

HAO Xingliang, WANG Yingying, ZHANG Jian, LI Shuang, WANG Naizhi, JI Yanrong.
The Journal of Practical Medicine . 2021, (4): 458 -462 .  DOI: 10.3969/j.issn.1006⁃5725.2021.04.008