Study	Reason for exclusion
Brandstetter 2018	Development and proposal of a "decision tree" for prioritising donor breast milk use
Castellano 2019	Retrospective cohort study if impact of the availability of donor human milk
Colaizy 2015	Review article describing ongoing trials by authors, but without outcome data
Cooper 1984	Non‐randomised study in preterm infants of feeding with formula or donor breast milk
Hair 2014	Randomised trial of human milk "cream" supplementation in very low birth weight infants
Jarvenpaa 1983	Non‐randomised study comparing growth in low birth weight infants fed formula versus breast milk
Marseglia 2015	Randomised trial of a new preterm formula versus another formula, and a "reference" control group of infants fed with human milk based on maternal preference
Narayanan 1982	Comparative trial in low birth weight infants of feeding with formula milk versus "expressed human milk". Many of the infants were allocated to the human milk groups by preference rather than randomly
O'Connor 2003	Non‐randomised study comparing growth, feeding tolerance, morbidity and development in low birth weight infants fed human milk or formula
Perrella 2015	Non‐randomised study of gastric emptying rates in infants fed with fortified versus non‐fortified human milk
Putet 1984	Non‐randomised study of feeding very preterm infants with pooled human milk versus formula
Sullivan 2010	Randomised controlled trial of feeding very low birth weight infants with formula plus bovine milk‐based fortifier versus donor human milk plus human milk‐based fortifier; excluded because type of fortifier was cointervention
Svenningsen 1982	Randomised trial of two different formulas versus breast milk in low birth weight infants‐ most infants in the breast milk group received their own mother's expressed milk rather than donor breast milk (not randomised)
Tewari 2018	Randomised trial of early versus late feeding of very preterm infants with maternal or donor breast milk