[1] Univ Laval, Div Thorac Surg, IUCPQ, Quebec City, PQ G1V 4G5, Canada
[2] Hop Louis Pradel, Dept Thorac Surg, F-69677 Bron, France
[3] Western Univ, Dept Thorac Surg, Schulich Sch Med & Dent,Victoria Hosp, London Hlth Sci Ctr,Crit Care Trauma Ctr, London, ON N9A 5W9, Canada