Methods
This was a 10-years retrospective review of infants with sBPD at a tertiary and transferred medical center, Taipei Veterans General Hospital in Taiwan, who underwent FE from January 2011 to December 2020. Only FE performed after made sBPD diagnosis during the hospitalization were included for this analysis. Written informed consent was obtained from parents/legal guardians before the FE procedure. Ethical committee review board of hospital approved this study (IRB-TPEVGH No.:2021-08-015BC).