1. Outcome among surviving very low birthweight infants: a meta-analysis;Escobar, G.J.; Littenberg, B.; Petitti, D.B.;Arch Dis Child,1991
2. Outcome for infants of very low birthweight: survey of world literature;Stewart, A.L.; Reynolds, E.O.R.; Lipscomb, A.P.L.;Lancet,1981
3. Birthweight specific trends in cerebral palsy;Pharoah, P.O.D.; Cooke, T.; Cooke, R.W.I.; Rosenbloom, L.;Arch Dis Child,1990
4. Costs and benefits of neonatal intensive care;RC, Pharoah P.O.D.Stevenson; RWI, Cooke; B, Sandhu;Arch Dis Child,1988
5. SPSS-X users guide;Inc, S.P.S.S.,1988