1Lumley J.Defining the problem:The epidemiology at preterm birth[J].BJOG,2003,110(Suppl 20):3-7.
2Pasquier JC,Bujold E,Rabilloud M,etal.Effect of latency period afterpremature rupture of membranes on 2 year infant mortality(DOMI-NOS study)[J].Eur J Obstet Gynecol Reprod Hoi,2007,135 (1):21-27.
3Larroque B,Ancel PY,Marret S,et al.Neurodevelopmentaldisabilities and special care of 5-year-old children bom before 33weeks of gestation(the EPIPAGE study):A longitudinal cohort study[J].Lancet,2008,371(9615):813-820.