Survival and neonatal and neurodevelopmental outcome of 24 - 29 week gestation infants according to primary cause of preterm delivery - Gray,P.H.; Hurley,T.M.; Rogers,Y.M.; o’Callaghan,M.J.; Tudehope,D.I.; Burns,Y.R.; Phty,M.; Mohay,H.A. (Aust NZ J Obstet Gyn, 1997)