Perez 2015.

Methods	Quasi‐randomised controlled trial
Participants	200 low birth weight infants with insufficient maternal breast milk from birth to three weeks or until hospital discharge Neonatal units in San Carlos, Guatemala, 2012 to 2013
Interventions	Preterm formula (N = 100) versus donor breast milk (N = 100) given as a supplement to maternal breast milk (unfortified)
Outcomes	Growth parameters for three weeks Necrotising enterocolitis (unclear how defined)
Notes	Awaiting further information from authors regarding methods and findings