[1] Cochin Port Royal Hosp, AP HP, Dept Neonatal Med, FHU PREMA, F-75014 Paris, France
[2] Children Hosp, Dept Neonatal Med, F-31000 Toulouse, France
[3] Univ Hosp, Dept Neonatal Med, F-49000 Angers, France
[4] Univ Hosp, Dept Neonatal Med, Pole Femme Couple Enfant, PeriTox,UMR I 01,UFR Med,UPJV, F-80000 Amiens, France
[5] Jeanne de Flandre Hosp, Dept Neonatal Med, F-59000 Lille, France
[6] Univ Paris, Epidemiol & Stat Res Ctr CRESS, INRA, INSERM, F-75004 Paris, France
[7] Lyon Univ, Femme Mere Enfant Hosp, Hosp Civils Lyon,CNRS,ENS Lyon, Infectiol Res Int Ctr,Unite INSERM U1111,UMR5308, F-69000 Lyon, France
[8] Univ Hosp, Neonatal & Paediat Intens Care Unit, F-86000 Poitiers, France