Variations in length of stay among survived very preterm infants admitted to Chinese neonatal intensive care units.

"Declarations Ethical approvalEthical approval was obtained from the Ethics Review Board of Children’s Hospital of Fudan University (2018-296), which was recognized by all participating hospitals. Waiver of consent was granted at all sites due to de-identified data used in this study. 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 This work was funded by the Canadian Institutes of Health Research (CTP87518 to Shoo K. Lee)."