Received: 23 February 2022
Accepted: 12 September 2022
First Online: 23 September 2022
: This study was performed following the Declaration of Helsinki and approved by the Human Research Ethics Committee of South Eastern Sydney Local Health District (Reference Number: 17/083). All parents or legal guardians provided written informed consent for infants to participate in the study.
: Not applicable.
: The specialised nasogastric feeding tubes required for this study were provided at no cost by the manufacturer (Getinge AB, Gothenburg, Sweden). The manufacturer had no involvement in study concept, design, conduct, analyses or manuscript preparation.