[1] Hop Bicetre, AP HP, Serv Anesthesie Reanimat, F-74275 Le Kremlin Bicetre, France
[2] Univ Lyon 1, Hop Mere Enfant, Serv Anesthesie Reanimat, F-69288 Lyon 02, France
[3] Hop Antoine Beclere, Dept Anesthesie Reanimat, F-92141 Clamart, France
[4] Hop Tenon, INSERM, Unite Rech Epidemiol Sante Perinatale & Sante Fam, F-75020 Paris, France