Study on Changes of Bacterial Spectrum and Drug Resistance in PICU Before and After COVID-19 Pandemic 
Zhu Yongbing, Fu Lina, Chen Zhongju, et al
Acta Medicinae Universitatis Scientiae et Technologiae Huazhong . 2023, (2): 233 -238 .  DOI: 10.3870/j.issn.1672-0741.2023.02.016