Health economics evaluation of nosocomial infection in patients with COPD
GE Yongchun, XU Hongmei, WANG Jing, MENG Li, SUN Jihua, ZHAO Ranran
滨州医学院学报 . 2020, (4): 301 -304 .  DOI: 10.19739/j.cnki.issn1001-9510.2020.04.018