Kim, Seung Hyun
Son, Joonhyuk
Park, Hyun-Kyung
Article History
Received: 19 April 2024
Revised: 27 June 2024
Accepted: 13 August 2024
First Online: 24 August 2024
Competing interests
: The authors declare no conflict of interest.
: The KNN registry was approved by the institutional review board at each participating hospital. This study was approved by the Institutional Review Board of the Hanyang University Medical Center (2024-02-035).
: Informed consent was obtained from the parents of each infant at enrollment in the NICUs participating in the KNN.