Pathogenic changes of community-acquired pneumonia in a children's hospital in Beijing, China before and after COVID-19 onset: a retrospective study.

"Declarations Ethical approvalThis study was approved by the Medical Ethics Committee of the Children’s Hospital affiliated to the Capital Institute of Pediatrics (REC approval number: SHERLL2020052). Conflict of interestNo financial or non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article. The authors have no conflict of interest to declare. Conflict of interest No financial or non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article. The authors have no conflict of interest to declare."

"Funding The study was supported by The Special Fund of the Pediatric Coordinated Development Center of Beijing Hospitals Authority (XTCX201821)."