Kitajima et al in 1997 reported mental retardation and cerebral palsy outcome at six years with no significant statistical difference among study groups was observed.
AlFaleh K, Anabrees J, Bassler D, Al-Kharfi T. Probiotics for prevention of necrotizing enterocolitis in preterm infants. Cochrane Database of Systematic Reviews 2011 , Issue 3 . Art. No.: CD005496. DOI: 10.1002/14651858.CD005496.pub3 .