The evaluation value of serum and lower respiratory tract secretion SLPI in severe pneumonia in ICU 
WU Daorong, YAN Xuebo, WEN Tingyu, SONG Qiuming.
The Journal of Practical Medicine . 2023, (12): 1529 -1535 .  DOI: 10.3969/j.issn.1006⁃5725.2023.12.012