1. University of Montreal Hospital Research Center (CRCHUM),Laboratory of Biorheology and Medical Ultrasonics,Montréal,Canada
2. Concordia University,Department of Electrical and Computer Engineering,Montréal,Canada
3. University of Montreal,Department of Anesthesia and Pain Medicine,Montréal,Canada
4. University of Montreal Hospital,Department of Medicine,Montréal,Canada
5. University of Montreal Hospital,Critical Care Division,Department of Medicine,Montréal,Canada