[1] McGill Univ, Montreal Gen Hosp, Hlth Ctr, Dept Anesthesia, 1650 Cedar Ave,Room 10-145-3, Montreal, PQ H3G 1A4, Canada
[2] McGill Univ, Montreal Gen Hosp, Hlth Ctr, Dept Trauma Surg, Montreal, PQ, Canada
[3] McGill Univ, Montreal Gen Hosp, Hlth Ctr, Dept Radiol, Montreal, PQ, Canada
[4] McGill Univ, Montreal Gen Hosp, Hlth Ctr, Dept Cardiothorac Surg, Montreal, PQ, Canada