1 Department of Anesthesia and Intensive Care, Hospices Civils de Lyon, Femme Mère Enfant Hospital, University of Lyon, Lyon, France. Electronic address: fp_desgranges@yahoo.fr.
2 Department of Anesthesia and Intensive Care, Hospices Civils de Lyon, Femme Mère Enfant Hospital, University of Lyon, Lyon, France.
3 Department of Anesthesia and Intensive Care Medicine, University Hospital of Marseille, Marseille, France.