1. Department of Pediatric Anesthesia and Intensive Care Medicine; Femme Mère Enfant Teaching Hospital; Hospices Civils de Lyon; Claude Bernard Lyon 1 University; Lyon France
2. Department of Anesthesia and Intensive Care Medicine; Sauvegarde Clinic; Claude Bernard Lyon 1 University; EA4169; SFR Lyon-Est Santé - INSERM US 7- CNRS UMS 3453; Lyon France
3. Department of Anesthesia; Montauban Hospital; Montauban France
4. Laboratory of Physics; Ecole Normale Supérieure de Lyon; Lyon France
5. Oeste Paulista University (UNOESTE); Presidente Prudente; São Paulo Brasil
6. Department of Anesthesia and Perioperative Care; School of Medicine; University of California Irvine; Orange CA USA