Received: 1 May 2020
Accepted: 15 September 2020
First Online: 23 September 2020
Ethics approval and consent to participate
: This study was approved by the Joint Chinese University of Hong Kong-New Territories East Cluster Clinical Research Ethics Committees of The Chinese University of Hong Kong (CREC Ref. No.: 2015.405) and the Research Ethics Committee (Kowloon Central/ Kowloon East) (Ref.: KC/KE-15-0159/ER-1) and performed in accordance with the Declaration of Helsinki. Written informed consent was obtained from the nurses and parents of all participating neonates.
: Not applicable.
: The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
: The authors declare that they have no competing interests.