Didier Dreyfuss1, David Hajage2, Stéphane Gaudry3. 1. Hôpital Louis Mourier, Colombes, France; INSERM IAME UMR 1137, Paris, France; Univ Paris Diderot, Paris, France. 2. Univ Paris Diderot, Paris, France; Hôpital Pitié-Salpêtrière, Paris, France. 3. Hôpital Louis Mourier, Colombes, France; Univ Paris Diderot, Paris, France.