Cristofalo 2013.

Methods	Randomised controlled trial
Participants	53 newborn infants: birth weight 500 g to 1250 g Exclusions: major congenital abnormalities, high likelihood of transfer to a non‐study site after 48 hours Seven neonatal intensive care units: six in USA, one in Austria (Probably) 2010 to 2012
Interventions	Preterm formula milk (N = 24) versus fortified (with human milk‐based fortifier), pasteurised donor breast milk (N = 29). Assigned until 91 days after birth, or discharge, or oral feeding at least 50% of feeds
Outcomes	Duration of parenteral nutrition, growth, respiratory support, and NEC
Notes	Additional information on methods courtesy of Dr Cristafalo (April 2014)
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Random sequence generated centrally in permuted blocks stratified by investigational site
Allocation concealment (selection bias)	Low risk	Allocation outcome provided to an individual at each site who was not connected with the evaluation of outcomes for participants
Blinding (performance bias and detection bias) All outcomes	Low risk	Investigators, caregivers, and families were masked
Incomplete outcome data (attrition bias) All outcomes	Low risk	100% follow‐up
Selective reporting (reporting bias)	Low risk	No deviations from protocol
Other bias	Unclear risk	Funded by Prolacta Bioscience